Ó Díscín
Ó DÍSCÍN—I—O Duskin, Diskin; 'descendant of Díscín' (diminutive of díosc, apparently not a personal name); the name of a family of the Ui Fiachrach who were formerly seated in the townland of Baile Ui Dhiscin, anglicised Ballyeeskeen, in the parish of Templeboy, Co. Sligo; now not uncommon in Co. Galway and other parts of Connacht.
Alphabetical Index to Irish Surnames