The Yemeni Hamdanids (Arabic: الهمدانيون) was a series of three families descended from the Arab Banū Hamdān tribe, who ruled in northern Yemen between 1099 and 1174. They were expelled from power when the Ayyubids conquered Yemen in 1174. They were a Shia Ismaili dynasty that followed the Fatimid Caliphs based in Egypt. They were also Hafizi Ismaili as opposed to the Taiyabi Ismaili.