diff --git a/.github/workflows/nightly-build.yml b/.github/workflows/nightly-build.yml
index 02cca5a2..f2d78fef 100644
--- a/.github/workflows/nightly-build.yml
+++ b/.github/workflows/nightly-build.yml
@@ -21,7 +21,7 @@ jobs:
             C_COMPILER: clang_osx-arm64 
             FORTRAN_COMPILER: gfortran_osx-arm64
             PROJECT_DIR: workdir/macos_arm64
-          - RUNNER_OS: 'macos-13'
+          - RUNNER_OS: 'macos-15-intel'
             OS: osx-64
             OS_NAME: osx_64
             MINIFORGE_INSTALLER_URL: https://github.com/conda-forge/miniforge/releases/latest/download/Miniforge3-MacOSX-x86_64.sh
diff --git a/Src/cmor.c b/Src/cmor.c
index 16fc86de..62f01d8a 100644
--- a/Src/cmor.c
+++ b/Src/cmor.c
@@ -3141,6 +3141,11 @@ int cmor_setGblAttr(int var_id)
 /* -------------------------------------------------------------------- */
 /*     Set branded variable attributes                                  */
 /* -------------------------------------------------------------------- */
+    if (cmor_vars[var_id].branded_variable[0] != '\0') {
+        cmor_set_cur_dataset_attribute_internal(GLOBAL_ATT_BRANDEDVARIABLE,
+                                                cmor_vars[var_id].branded_variable,
+                                                0);
+    }
     if (cmor_vars[var_id].branding_suffix[0] != '\0') {
         cmor_set_cur_dataset_attribute_internal(GLOBAL_ATT_BRANDINGSUFFIX,
                                                 cmor_vars[var_id].branding_suffix,
diff --git a/Src/cmor_tables.c b/Src/cmor_tables.c
index 370564ca..5cf32a86 100644
--- a/Src/cmor_tables.c
+++ b/Src/cmor_tables.c
@@ -246,6 +246,7 @@ int cmor_set_variable_entry(cmor_table_t * table,
             &variable_entry[pmatch[2].rm_so], 
             pmatch[5].rm_eo - pmatch[2].rm_so);
         variable->branding_suffix[pmatch[5].rm_eo - pmatch[2].rm_so] = '\0';
+        cmor_set_var_def_att(variable, VARIABLE_ATT_BRANDEDVARIABLE, variable_entry);
     }
     regfree(&regex);
 
diff --git a/Src/cmor_variables.c b/Src/cmor_variables.c
index 5005928d..ecfd51c3 100644
--- a/Src/cmor_variables.c
+++ b/Src/cmor_variables.c
@@ -1165,6 +1165,7 @@ int cmor_variable(int *var_id, char *name, char *units, int ndims,
         strncpy(cmor_vars[vrid].id, refvar.out_name, CMOR_MAX_STRING);
     }
 
+    strncpy(cmor_vars[vrid].branded_variable, refvar.branded_variable, CMOR_MAX_STRING);
     strncpy(cmor_vars[vrid].branding_suffix, refvar.branding_suffix, CMOR_MAX_STRING);
     strncpy(cmor_vars[vrid].temporal_label, refvar.temporal_label, CMOR_MAX_STRING);
     strncpy(cmor_vars[vrid].vertical_label, refvar.vertical_label, CMOR_MAX_STRING);
@@ -1979,6 +1980,7 @@ void cmor_init_var_def(cmor_var_def_t * var, int table_id)
     var->deflate_level = 1;
     var->zstandard_level = -999999;
     memset(var->generic_level_name, 0, sizeof(var->generic_level_name));
+    memset(var->branded_variable, 0, sizeof(var->branded_variable));
     memset(var->branding_suffix, 0, sizeof(var->branding_suffix));
     memset(var->temporal_label, 0, sizeof(var->temporal_label));
     memset(var->vertical_label, 0, sizeof(var->vertical_label));
@@ -2237,6 +2239,10 @@ int cmor_set_var_def_att(cmor_var_def_t * var, char *att, char *val)
 
         strncpy(var->out_name, val, CMOR_MAX_STRING);
 
+    } else if (strcmp(att, VARIABLE_ATT_BRANDEDVARIABLE) == 0) {
+
+        strncpy(var->branded_variable, val, CMOR_MAX_STRING);
+
     } else if (strcmp(att, VARIABLE_ATT_BRANDINGSUFFIX) == 0) {
 
         strncpy(var->branding_suffix, val, CMOR_MAX_STRING);
diff --git a/Test/test_cmor_CMIP7.py b/Test/test_cmor_CMIP7.py
index 15e01da9..0eea3697 100644
--- a/Test/test_cmor_CMIP7.py
+++ b/Test/test_cmor_CMIP7.py
@@ -102,6 +102,7 @@ def test_cmip7(self):
         ds = Dataset(filename)
         attrs = ds.ncattrs()
         test_attrs = {
+            'branded_variable': 'tos_tavg-u-hxy-sea',
             'branding_suffix': 'tavg-u-hxy-sea',
             'temporal_label': 'tavg',
             'vertical_label': 'u',
@@ -178,6 +179,7 @@ def test_secondary_modeling_realm(self):
         ds = Dataset(filename)
         attrs = ds.ncattrs()
         test_attrs = {
+            'branded_variable': 'prra_tavg-u-hxy-is',
             'branding_suffix': 'tavg-u-hxy-is',
             'temporal_label': 'tavg',
             'vertical_label': 'u',
diff --git a/include/cmor.h b/include/cmor.h
index 05164426..c3f51686 100644
--- a/include/cmor.h
+++ b/include/cmor.h
@@ -148,6 +148,7 @@
 #define VARIABLE_ATT_FLAGMEANINGS     "flag_meanings"
 #define VARIABLE_ATT_OUTNAME          "out_name"
 #define VARIABLE_ATT_BRANDDESCRIPTION "brand_description"
+#define VARIABLE_ATT_BRANDEDVARIABLE  "branded_variable"
 #define VARIABLE_ATT_BRANDINGSUFFIX   "branding_suffix"
 #define VARIABLE_ATT_TEMPORALLABEL    "temporal_label"
 #define VARIABLE_ATT_VERTICALLABEL    "vertical_label"
@@ -172,6 +173,7 @@
 #define GLOBAL_ATT_ACTIVITY_ID        "activity_id"
 #define GLOBAL_ATT_VAL_NODRIVER       "no-driver"
 #define GLOBAL_ATT_VARIABLE_ID        "variable_id"
+#define GLOBAL_ATT_BRANDEDVARIABLE    "branded_variable"
 #define GLOBAL_ATT_BRANDINGSUFFIX     "branding_suffix"
 #define GLOBAL_ATT_TEMPORALLABEL      "temporal_label"
 #define GLOBAL_ATT_VERTICALLABEL      "vertical_label"
@@ -494,6 +496,7 @@ typedef struct cmor_variable_def_ {
     char frequency[CMOR_MAX_STRING];
     char out_name[CMOR_MAX_STRING];
     char generic_level_name[CMOR_MAX_STRING];
+    char branded_variable[CMOR_MAX_STRING];
     char branding_suffix[CMOR_MAX_STRING];
     char temporal_label[CMOR_MAX_STRING];
     char vertical_label[CMOR_MAX_STRING];
@@ -564,6 +567,7 @@ typedef struct cmor_var_ {
     char suffix[CMOR_MAX_STRING];
     int suffix_has_date;
     char frequency[CMOR_MAX_STRING];
+    char branded_variable[CMOR_MAX_STRING];
     char branding_suffix[CMOR_MAX_STRING];
     char temporal_label[CMOR_MAX_STRING];
     char vertical_label[CMOR_MAX_STRING];