This interesting surname has two distinct possible sources. Firstly, the surname may be of Irish origin, and is an Anglicized form of the Gaelic "O'Muirgheasa", descendant of "Muirgheasa", a personal name apparently derived from the elements "muir", sea, and "geas", action, and are a branch of the "Ui Fiachra", having their territory at the southern side of Sligo Bay. These are of MacDermot stock, being descended from Muiris, the grandson of a famous MacDermot. However, there is no Gaelic sept of Morrissey associated with Munster or Leinster.
Join the conversation with the MORRISSEY tribe
Find your MORRISSEY ancestor
Tell us about your MORRISSEY Family
Tell us about your MORRISSEY ancestors
Ask a question about the MORRISSEY history
Leave a message for MORRISSEY family members
Areas of Origin for MORRISSEY
Invite more MORRISSEY family members!
Write an email address and click 'Invite' to share this page with more members of the MORRISSEY tribe.