Mcstay Family History
Mcstay Name Meaning
Irish (Ulster especially Down and Armagh): altered Anglicized form (by erroneous association with the prefix Mac) of Gaelic Ó Maoilstéighe ‘descendant of Maoilstéighe’ a personal name beginning maol ‘tonsured one devotee’. This surname was once Anglicized as O'Mustey a form that is no longer found.
Source: Dictionary of American Family Names 2nd edition, 2022