This page categorizes the "Great Clans" that the modern-day Clan cat's myths are based on. Cats from all four Clans are said to be descended from these three ancient Clans.
“LionClan was a great Clan, along with the other ancient Clans, TigerClan and LeopardClan. Named...LionClan (Mythological)
“LeopardClan is one of the ancient Clans, along with LionClan and TigerClan. It consisted of...LeopardClan