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