Medieval names: Aymeric
Feudal name, Aymerick has the same etymology as Henri, Heimerich in Old German: halm, "the house" in the sense of "the family" and rik, "leader". Aymeric is sort of "the leader of the tribe" ... be careful with yours!
His party : November 4th.
Its derivatives: Aimeric, American, Aymeri, Aymerick, Emeric, Imré.