The Koga family gave rise to the Nakanoin family, which later became a family of ministers; additionally, it produced a total of ten branch families that were recognized as being Tosho-ke (hereditary court nobles occupying relatively high rank) families, including the Kitabatake and Iwakura families.
久我家からは大臣家となる中院家やその分家筋である北畠家、岩倉家他、合計10家の堂上家を輩出した。