Board Thread:Wiki Discussions and Support/@comment-995176-20141123043523/@comment-25417671-20141127002952

Stevemagegod wrote: YasakaMagatama wrote: I don't think the theory of red hair is 100% right, if I were judging by hair Gaara would be Uzumaki clan also...

You could be right since Gaara's last name is never revealed in the series(?). Not to mention they did say that the survivors of the Uzumaki Clan were spread all around the world.

But no one from his family, is officially known as the Uzumaki clan. If he were some of the databook's should have revealed that for a long time.