Very numerous: all areas. Ir. Mac Giolla Phádraig (son of Patrick's servant). This is the only Fitz- name of indigenous origin - they were chiefs of Ossory (Kilkenny-Laois) at the time of the Norman Invasion and are still numerous there. The Fitzpatricks of Ulster are thought to be related to Maguire Fermanagh. See also Kilpatrick. IF,MIF, SGG.
numerous: Ulster generally. Ir. Mac Giolla Phadraig (devotee of St Patrick). In the South, it appears as Fitzpatrick, q.v.
Mac Giolla Phádraig
Fitzpatrick: líonmhar ar fud na tíre. Tá Kilpatrick amhlaidh in Ultaibh. Clann a bhí chun tosaigh in Osraí aimsir an Ionraidh. S'iad an t-aon dream Gaelach go bhfuil an réimír "Fitz" acu. Dream de bhunadh Albanach is ea na h-Ultaigh, cuid mhaith.