Mac Séarthúin
Mac SÉARTHÚIN—V—M'Sherhown, M'Sherone, Shearhoon, (?) Syron, [Prendergast]; 'son of *Geoffron' (diminutive of Geoffrey); a patronymic surname assumed by a branch of the Prendergasts in Kerry.
Alphabetical Index to Irish Surnames
Mac SÉARTHÚIN—V—M'Sherhown, M'Sherone, Shearhoon, (?) Syron, [Prendergast]; 'son of *Geoffron' (diminutive of Geoffrey); a patronymic surname assumed by a branch of the Prendergasts in Kerry.
Alphabetical Index to Irish Surnames