Gilsenan Family History
Gilsenan Name Meaning
Irish (Meath): shortened form of MacGils(h)enan an Anglicized form of Gaelic Mac Giolla Seanáin ‘son of the servant or devotee of Saint Senan’. Gilsenan has sometimes been Anglicized as Gilson and a northern Irish variant Mag Uinseanáin formerly Anglicized as McGunshenan has now been replaced by Nugent . Leonard has also sometimes been adopted as equivalent.
Source: Dictionary of American Family Names 2nd edition, 2022