Gillis Family History
Gillis Name Meaning
Scottish (western) and Irish (Ulster): Anglicized form of Scottish Gaelic Gille Iosa Irish Giolla Íosa ‘servant of Jesus’ or a shortened form from Mac Gille Íosa or Mac Giolla Íosa ‘son of the servant of Jesus’. Compare McLeish . The usual spelling in Scotland is Gillies . Flemish Dutch and Walloon: from the personal name Gillis a Flemish equivalent and Walloon variant of French and Walloon Gilles .
Source: Dictionary of American Family Names 2nd edition, 2022