The name MacIlroy has seen many modifications since the time in which it was first devised. In Gaelic it appeared as Mac Giolla Rua, which means son of the red-haired youth. First found in county Clare where they held a family seat from ancient times, and were directly descended from Irial, the ancient King of Ulster.
Origins: Irish, Scottish.
Spelling variations: Gilroy, Kilroy, MacGilroy, MacElroy, MacGreevy, Greevy, MacGilrea, McGilroy, McElroy, McGreevy, McGilrea, MacIlrea, McIlrea, Magilroy, Magilrea, MacElry, McElry, MacIlree and many more.