subclan
noun
                                                                                                                            
                                                            sub·clan
                    
                                                                                                              
                                                                                                                                  ˈsəb-ˌklan 
                                                      
                                                          
            
            variants  
 or sub-clan
        
    
            
               plural subclans or sub-clans            
        
    
                                
              
          
                                                      : a clan that is part of a larger clan                                      
              
                             
… clans may contain clans, which are usually called subclans.—
Marvin Harris
                                       There are six main clans and minority groups, and dozens of subclans.—
Edmund Sanders
                         
                
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  Merriam-Webster unabridged




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