Gargoyle Clan - Avalon Clan

The Avalon Clan is a clan that resides on the mythical Isle of Avalon, where an hour spent on the island equates to a day in the "real" world. This means that for the island's inhabitants, that while a thousand years passed since their arrival on the island, the inhabitants have only experienced just over forty-one years. Unusually among many clans in the Gargoyles universe, the clan includes three human members who protected the clan while still unhatched.

Much like the Manhattan Clan around which the show revolves, the Avalon Clan is an offshoot of a gargoyle clan from Wyvern Castle in Scotland. When the majority of the clan was destroyed by Vikings, the 36 gargoyle eggs in the rookery were taken away by four humans - Princess Katharine, the Magus, and the peasant woman Mary and her son Tom. The eggs remained protected by these humans and brought to Avalon (only Mary remained behind), where they remained and grew to adulthood. They were raised by the humans that had protected them as eggs, and were largely untouched by the outside world. Angela later stated that she had "fifteen rookery sisters" on Avalon, and Greg Weisman has stated there were three gargoyle beasts in the clan, meaning that the remaining seventeen gargoyles were male.

The Avalon Clan was introduced to the show when Tom (now the elderly Guardian of the Eggs) arrived in Manhattan searching for Goliath, to see if he had been woken from his stone slumber. Goliath, along with the human Elisa Maza and the gargoyle beast Bronx, traveled to Avalon and helped save the clan from attack by the Archmage.

Unlike traditional gargoyle clans, the Avalon Clan was raised by humans. Series creator Greg Weisman has indicated that because of this, the gargoyles on Avalon tend to have a more "human" nature than most of their species; perhaps most notable is the fact that each member was given a name at birth (such as Angela or Gabriel) rather than the usual gargoyle tradition. Similarly, Angela developed a human-like expectation of being acknowledged by Goliath as a daughter, which he was initially uncomfortable with on cultural grounds.