diff --git a/doc/environments/groupthm/groupthm.dtx b/doc/environments/groupthm/groupthm.dtx
index 3cdc246..d765aba 100644
--- a/doc/environments/groupthm/groupthm.dtx
+++ b/doc/environments/groupthm/groupthm.dtx
@@ -858,6 +858,7 @@
 %    \begin{macrocode}
 \cs_new:Npn \@@_thmtools_declare_theorem:nn #1 #2
 {
+  \tl_log:n { Declaring ~ thmtools ~ theorem ~ #2 }
   \declaretheorem [ #1 ] { #2 }
 }
 \cs_generate_variant:Nn \@@_thmtools_declare_theorem:nn { V n }
@@ -1201,7 +1202,7 @@
 \cs_new:Npn \@@_sort_theorem_group_names:
   {
     \hook_gremove_code:nn { @@/groupsort  }{*}
-    \clist_map_function:NN \l_@@_group_clist \__add_to_sort_hook:n
+    \clist_map_function:NN \l_@@_group_clist \@@_add_to_sort_hook:n
     \clist_clear:N \l_@@_group_clist
     \hook_use:n { @@/groupsort }
   }
@@ -1808,7 +1809,12 @@
 % 
 % 
 %
-% \begin{macro}{\groupthm_new_grouped_theorem:nnnn,\groupthm_new_grouped_theorem:nVVV}
+% \begin{macro}
+% {
+%   \groupthm_new_grouped_theorem:nnnn,
+%   \groupthm_new_grouped_theorem:nVVV,
+%   \groupthm_new_grouped_theorem:xVnn
+% }
 %    \begin{syntax}
 %       \cs{groupthm_new_grouped_theorem:nnnn}\marg{environment name}
 %       \marg{groups clist}\marg{theorem name}\marg{thmtools keys}
@@ -1834,6 +1840,10 @@
   }
 \cs_generate_variant:Nn \groupthm_new_grouped_theorem:nnnn { n V V V }
 %    \end{macrocode}
+% We need this extra variant here for the generation of theorem families later:
+%    \begin{macrocode}
+\cs_generate_variant:Nn \groupthm_new_grouped_theorem:nnnn { x V n n }
+%    \end{macrocode}
 % \end{macro}
 % 
 % 
@@ -2221,7 +2231,7 @@
 %  The \meta{generation type} can be either \texttt{new} or \texttt{provide},
 %  depending on which backend for grouped theorem generation to use
 %    \begin{macrocode}
-\cs_new:Npn \@@_declare_grouped_theorem_family_aux:nnnnnn
+\cs_new:Npn \@@_declare_grouped_theorem_family_aux:nnnnnn #1 #2 #3 #4 #5 #6
   {
 %    \end{macrocode}
 % Make a local copy of the \meta{groups clist} argument,
@@ -2240,7 +2250,7 @@
 % This sorting is necessary so that for each theorem family and set of groups,
 % the generated name will be unique:
 %    \begin{macrocode}
-        \__sort_group_names:
+        \@@_sort_theorem_group_names:
 %    \end{macrocode}
 % Now just declare the grouped theorem, passing the corresponding arguments and using
 % specified \texttt{\#6} as backend.
@@ -2436,10 +2446,10 @@
 %    \begin{macrocode}
 \cs_new:Npn \groupthm_new_grouped_theorem_family_from_keys:nn #1 #2
   {
-    \@@_set_normalized_keys:nn { #1 } { #2 }
+    \@@_set_normalized_keys:nnn { #1 } { groupedtheorem } { #2 }
     \groupthm_new_grouped_theorem_family:nVVV
       { #2 }
-      \l_@@_groups_clist
+      \l_@@_group_clist
       \l_@@_name_tl
       \l_@@_thmtools_clist
   }
@@ -2458,10 +2468,10 @@
 %    \begin{macrocode}
 \cs_new:Npn \groupthm_provide_grouped_theorem_family_from_keys:nn #1 #2
   {
-    \@@_set_normalized_keys:nn { #1 } { #2 }
+    \@@_set_normalized_keys:nnn { #1 } {groupedtheorem} { #2 }
     \groupthm_provide_grouped_theorem_family:nVVV
       { #2 }
-      \l_@@_groups_clist
+      \l_@@_group_clist
       \l_@@_name_tl
       \l_@@_thmtools_clist
   }
@@ -2480,10 +2490,10 @@
 %    \begin{macrocode}
 \cs_new:Npn \groupthm_new_grouped_theorem_family_star_from_keys:nn #1 #2
   {
-    \@@_set_normalized_keys:nn { #1 } { #2 }
+    \@@_set_normalized_keys:nnn { #1 } { groupedtheorem }{ #2 }
     \groupthm_new_grouped_theorem_family_star:nVVV
       { #2 }
-      \l_@@_groups_clist
+      \l_@@_group_clist
       \l_@@_name_tl
       \l_@@_thmtools_clist
   }
@@ -2502,10 +2512,10 @@
 %    \begin{macrocode}
 \cs_new:Npn \groupthm_provide_grouped_theorem_family_star_from_keys:nn #1 #2
   {
-    \@@_set_normalized_keys:nn { #1 } { #2 }
+    \@@_set_normalized_keys:nnn { #1 } { groupedtheorem }{ #2 }
     \groupthm_provide_grouped_theorem_family_star:nVVV
       { #2 }
-      \l_@@_groups_clist
+      \l_@@_group_clist
       \l_@@_name_tl
       \l_@@_thmtools_clist
   }
@@ -2524,10 +2534,10 @@
 %    \begin{macrocode}
 \cs_new:Npn \groupthm_new_theorem_family_from_keys:nn #1 #2
   {
-    \@@_set_normalized_keys:nn { #1 } { #2 }
+    \@@_set_normalized_keys:nnn { #1 } { groupedtheorem } { #2 }
     \groupthm_new_theorem_family:nVVV
       { #2 }
-      \l_@@_groups_clist
+      \l_@@_group_clist
       \l_@@_name_tl
       \l_@@_thmtools_clist
   }
@@ -2546,10 +2556,10 @@
 %    \begin{macrocode}
 \cs_new:Npn \groupthm_provide_theorem_family_from_keys:nn #1 #2
   {
-    \@@_set_normalized_keys:nn { #1 } { #2 }
+    \@@_set_normalized_keys:nnn { #1 } { groupedtheorem } { #2 }
     \groupthm_provide_theorem_family:nVVV
       { #2 }
-      \l_@@_groups_clist
+      \l_@@_group_clist
       \l_@@_name_tl
       \l_@@_thmtools_clist
   }
@@ -2568,10 +2578,10 @@
 %    \begin{macrocode}
 \cs_new:Npn \groupthm_new_theorem_family_star_from_keys:nn #1 #2
   {
-    \@@_set_normalized_keys:nn { #1 } { #2 }
+    \@@_set_normalized_keys:nnn { #1 } { groupedtheorem } { #2 }
     \groupthm_new_theorem_family_star:nVVV
       { #2 }
-      \l_@@_groups_clist
+      \l_@@_group_clist
       \l_@@_name_tl
       \l_@@_thmtools_clist
   }
@@ -2590,10 +2600,10 @@
 %    \begin{macrocode}
 \cs_new:Npn \groupthm_provide_theorem_family_star_from_keys:nn #1 #2
   {
-    \@@_set_normalized_keys:nn { #1 } { #2 }
+    \@@_set_normalized_keys:nnn { #1 } { groupedtheorem } { #2 }
     \groupthm_provide_theorem_family_star:nVVV
       { #2 }
-      \l_@@_groups_clist
+      \l_@@_group_clist
       \l_@@_name_tl
       \l_@@_thmtools_clist
   }
@@ -2617,10 +2627,10 @@
   {
     \IfBooleanTF { #1 }
       {
-        \groupthm_new_grouped_theorem_family_from_keys:nn { #2 } { #3 }
+        \groupthm_new_grouped_theorem_family_star_from_keys:nn { #2 } { #3 }
       }
       {
-        \groupthm_new_grouped_theorem_family_star_from_keys:nn { #2 } { #3 }
+        \groupthm_new_grouped_theorem_family_from_keys:nn { #2 } { #3 }
       }
   }
 %    \end{macrocode}
@@ -2640,10 +2650,10 @@
   {
     \IfBooleanTF { #1 }
       {
-        \groupthm_provide_grouped_theorem_family_from_keys:nn { #2 } { #3 }
+        \groupthm_provide_grouped_theorem_family_star_from_keys:nn { #2 } { #3 }
       }
       {
-        \groupthm_provide_grouped_theorem_family_star_from_keys:nn { #2 } { #3 }
+        \groupthm_provide_grouped_theorem_family_from_keys:nn { #2 } { #3 }
       }
   }
 %    \end{macrocode}
@@ -2662,10 +2672,10 @@
   {
     \IfBooleanTF { #1 }
       {
-        \groupthm_new_theorem_family_from_keys:nn { #2 } { #3 }
+        \groupthm_new_theorem_family_star_from_keys:nn { #2 } { #3 }
       }
       {
-        \groupthm_new_theorem_family_star_from_keys:nn { #2 } { #3 }
+        \groupthm_new_theorem_family_from_keys:nn { #2 } { #3 }
       }
   }
 %    \end{macrocode}
@@ -2685,10 +2695,10 @@
   {
     \IfBooleanTF { #1 }
       {
-        \groupthm_provide_theorem_family_from_keys:nn { #2 } { #3 }
+        \groupthm_provide_theorem_family_star_from_keys:nn { #2 } { #3 }
       }
       {
-        \groupthm_provide_theorem_family_star_from_keys:nn { #2 } { #3 }
+        \groupthm_provide_theorem_family_from_keys:nn { #2 } { #3 }
       }
   }
 %    \end{macrocode}
diff --git a/doc/environments/groupthm/groupthm.sty b/doc/environments/groupthm/groupthm.sty
index a0cf7c4..0de90f2 100644
--- a/doc/environments/groupthm/groupthm.sty
+++ b/doc/environments/groupthm/groupthm.sty
@@ -26,6 +26,7 @@
 \RequirePackage{thmtools}
 \cs_new:Npn \__groupthm_thmtools_declare_theorem:nn #1 #2
 {
+  \tl_log:n { Declaring ~ thmtools ~ theorem ~ #2 }
   \declaretheorem [ #1 ] { #2 }
 }
 \cs_generate_variant:Nn \__groupthm_thmtools_declare_theorem:nn { V n }
@@ -139,7 +140,7 @@
 \cs_new:Npn \__groupthm_sort_theorem_group_names:
   {
     \hook_gremove_code:nn { __groupthm/groupsort  }{*}
-    \clist_map_function:NN \l__groupthm_group_clist \__add_to_sort_hook:n
+    \clist_map_function:NN \l__groupthm_group_clist \__groupthm_add_to_sort_hook:n
     \clist_clear:N \l__groupthm_group_clist
     \hook_use:n { __groupthm/groupsort }
   }
@@ -414,6 +415,7 @@
       }
   }
 \cs_generate_variant:Nn \groupthm_new_grouped_theorem:nnnn { n V V V }
+\cs_generate_variant:Nn \groupthm_new_grouped_theorem:nnnn { x V n n }
 \cs_new:Npn \groupthm_provide_grouped_theorem:nnnn #1 #2 #3 #4
   {
     \cs_if_exist:cF { #1 }
@@ -579,6 +581,181 @@
       \groupthm_provide_theorem_from_keys:nn { #2 } { #3 }
     }
   }
+\cs_new:Npn \__groupthm_declare_grouped_theorem_family_aux:nnnnnn #1 #2 #3 #4 #5 #6
+  {
+    \clist_set:Nn \l_tmpa_clist { #2 }
+    \powerset_clist_foreach:Nn \l_tmpa_clist
+      {
+        \clist_set_eq:NN \l__groupthm_group_clist \l_tmpa_clist
+        \clist_put_right:Nn \l__groupthm_group_clist { #5 }
+        \__groupthm_sort_theorem_group_names:
+        \use:c{groupthm_#6_grouped_theorem:xVnn}
+          {__#1__groups_\clist_use:Nn \l__groupthm_group_clist {_}}
+          \l__groupthm_group_clist
+          { #3 }
+          { #4 }
+      }
+  }
+\cs_new:Npn \groupthm_new_grouped_theorem_family:nnnn #1 #2 #3 #4
+  {
+    \__groupthm_declare_grouped_theorem_family_aux:nnnnnn
+      { #1 } { #2 } { #3 } { #4 } { } { new }
+  }
+\cs_generate_variant:Nn \groupthm_new_grouped_theorem_family:nnnn { n V V V }
+\cs_new:Npn \groupthm_provide_grouped_theorem_family:nnnn #1 #2 #3 #4
+  {
+    \__groupthm_declare_grouped_theorem_family_aux:nnnnnn
+      { #1 } { #2 } { #3 } { #4 } { } { provide }
+  }
+\cs_generate_variant:Nn \groupthm_provide_grouped_theorem_family:nnnn { n V V V }
+\cs_new:Npn \groupthm_new_grouped_theorem_family_star:nnnn #1 #2 #3 #4
+  {
+    \__groupthm_declare_grouped_theorem_family_aux:nnnnnn
+      { #1 } { #2 } { #3 } { #4 } { unnumbered } { new }
+  }
+\cs_generate_variant:Nn \groupthm_new_grouped_theorem_family_star:nnnn { n V V V }
+\cs_new:Npn \groupthm_provide_grouped_theorem_family_star:nnnn #1 #2 #3 #4
+  {
+    \__groupthm_declare_grouped_theorem_family_aux:nnnnnn
+      { #1 } { #2 } { #3 } { #4 } { } { provide }
+  }
+\cs_generate_variant:Nn \groupthm_provide_grouped_theorem_family_star:nnnn { n V V V }
+\cs_new:Npn \groupthm_new_theorem_family:nnnn #1 #2 #3 #4
+  {
+    \__groupthm_declare_grouped_theorem_family_aux:nnnnnn
+      { #1 } { #2, starred } { #3 } { #4 } { } { new }
+  }
+\cs_generate_variant:Nn \groupthm_new_theorem_family:nnnn { n V V V }
+\cs_new:Npn \groupthm_provide_theorem_family:nnnn #1 #2 #3 #4
+  {
+    \__groupthm_declare_grouped_theorem_family_aux:nnnnnn
+      { #1 } { #2, starred } { #3 } { #4 } { } { provide }
+  }
+\cs_generate_variant:Nn \groupthm_provide_theorem_family:nnnn { n V V V }
+\cs_new:Npn \groupthm_new_theorem_family_star:nnnn #1 #2 #3 #4
+  {
+    \__groupthm_declare_grouped_theorem_family_aux:nnnnnn
+      { #1 } { #2, starred } { #3 } { #4 } { unnumbered } { new }
+  }
+\cs_generate_variant:Nn \groupthm_new_theorem_family_star:nnnn { n V V V }
+\cs_new:Npn \groupthm_provide_theorem_family_star:nnnn #1 #2 #3 #4
+  {
+    \__groupthm_declare_grouped_theorem_family_aux:nnnnnn
+      { #1 } { #2, starred } { #3 } { #4 } { } { provide }
+  }
+\cs_generate_variant:Nn \groupthm_provide_theorem_family_star:nnnn { n V V V }
+\cs_new:Npn \groupthm_new_grouped_theorem_family_from_keys:nn #1 #2
+  {
+    \__groupthm_set_normalized_keys:nnn { #1 } { groupedtheorem } { #2 }
+    \groupthm_new_grouped_theorem_family:nVVV
+      { #2 }
+      \l__groupthm_group_clist
+      \l__groupthm_name_tl
+      \l__groupthm_thmtools_clist
+  }
+\cs_new:Npn \groupthm_provide_grouped_theorem_family_from_keys:nn #1 #2
+  {
+    \__groupthm_set_normalized_keys:nnn { #1 } {groupedtheorem} { #2 }
+    \groupthm_provide_grouped_theorem_family:nVVV
+      { #2 }
+      \l__groupthm_group_clist
+      \l__groupthm_name_tl
+      \l__groupthm_thmtools_clist
+  }
+\cs_new:Npn \groupthm_new_grouped_theorem_family_star_from_keys:nn #1 #2
+  {
+    \__groupthm_set_normalized_keys:nnn { #1 } { groupedtheorem }{ #2 }
+    \groupthm_new_grouped_theorem_family_star:nVVV
+      { #2 }
+      \l__groupthm_group_clist
+      \l__groupthm_name_tl
+      \l__groupthm_thmtools_clist
+  }
+\cs_new:Npn \groupthm_provide_grouped_theorem_family_star_from_keys:nn #1 #2
+  {
+    \__groupthm_set_normalized_keys:nnn { #1 } { groupedtheorem }{ #2 }
+    \groupthm_provide_grouped_theorem_family_star:nVVV
+      { #2 }
+      \l__groupthm_group_clist
+      \l__groupthm_name_tl
+      \l__groupthm_thmtools_clist
+  }
+\cs_new:Npn \groupthm_new_theorem_family_from_keys:nn #1 #2
+  {
+    \__groupthm_set_normalized_keys:nnn { #1 } { groupedtheorem } { #2 }
+    \groupthm_new_theorem_family:nVVV
+      { #2 }
+      \l__groupthm_group_clist
+      \l__groupthm_name_tl
+      \l__groupthm_thmtools_clist
+  }
+\cs_new:Npn \groupthm_provide_theorem_family_from_keys:nn #1 #2
+  {
+    \__groupthm_set_normalized_keys:nnn { #1 } { groupedtheorem } { #2 }
+    \groupthm_provide_theorem_family:nVVV
+      { #2 }
+      \l__groupthm_group_clist
+      \l__groupthm_name_tl
+      \l__groupthm_thmtools_clist
+  }
+\cs_new:Npn \groupthm_new_theorem_family_star_from_keys:nn #1 #2
+  {
+    \__groupthm_set_normalized_keys:nnn { #1 } { groupedtheorem } { #2 }
+    \groupthm_new_theorem_family_star:nVVV
+      { #2 }
+      \l__groupthm_group_clist
+      \l__groupthm_name_tl
+      \l__groupthm_thmtools_clist
+  }
+\cs_new:Npn \groupthm_provide_theorem_family_star_from_keys:nn #1 #2
+  {
+    \__groupthm_set_normalized_keys:nnn { #1 } { groupedtheorem } { #2 }
+    \groupthm_provide_theorem_family_star:nVVV
+      { #2 }
+      \l__groupthm_group_clist
+      \l__groupthm_name_tl
+      \l__groupthm_thmtools_clist
+  }
+\NewDocumentCommand{\NewGroupedTheoremFamily}{s O{} m}
+  {
+    \IfBooleanTF { #1 }
+      {
+        \groupthm_new_grouped_theorem_family_star_from_keys:nn { #2 } { #3 }
+      }
+      {
+        \groupthm_new_grouped_theorem_family_from_keys:nn { #2 } { #3 }
+      }
+  }
+\NewDocumentCommand{\ProvideGroupedTheoremFamily}{s O{} m}
+  {
+    \IfBooleanTF { #1 }
+      {
+        \groupthm_provide_grouped_theorem_family_star_from_keys:nn { #2 } { #3 }
+      }
+      {
+        \groupthm_provide_grouped_theorem_family_from_keys:nn { #2 } { #3 }
+      }
+  }
+\NewDocumentCommand{\NewTheoremFamily}{s O{} m}
+  {
+    \IfBooleanTF { #1 }
+      {
+        \groupthm_new_theorem_family_star_from_keys:nn { #2 } { #3 }
+      }
+      {
+        \groupthm_new_theorem_family_from_keys:nn { #2 } { #3 }
+      }
+  }
+\NewDocumentCommand{\ProvideTheoremFamily}{s O{} m}
+  {
+    \IfBooleanTF { #1 }
+      {
+        \groupthm_provide_theorem_family_star_from_keys:nn { #2 } { #3 }
+      }
+      {
+        \groupthm_provide_theorem_family_from_keys:nn { #2 } { #3 }
+      }
+  }
 \endinput
 %%
 %% End of file `groupthm.sty'.