subfamily

plural subfamilies

1. biologyA taxonomic category ranking between a family and a genus; formerly called a tribe.
2. A secondary or subordinate grouping.

   There is a handy font editor tool in the engine, where you can import your font and create family and subfamily for your font (for example, the same font can have a family for its bold, italic, light, and dark style as its subfamily).

   2015, Nicola Valcasara, Unreal Engine Game Development Blueprints, page 142