Origin of the Fitzsimons name
An old family of English origin in Dublin and Westmeath (Woulfe), counted by Matheson among names of Anglo-Norman source. Irish form Mac Síomóin, 'son of Simon' or 'son of Sigemund'. The FitzSimons of Co. Westmeath assumed the Irish surname Mac an Ridire ('son of the knight').[1][2][4]
- 1484Walter FitzSimons consecrated Archbishop of Dublin.[6]
- 1487Archbishop FitzSimons joins the Earl of Kildare and others in crowning Simnel.[6]
- 1599Henry FitzSimon, Jesuit prisoner in Dublin Castle, disputes with the young Ussher.[7]
- 1787Irish-born Thomas FitzSimmons a delegate to the Federal Convention.[8]
- 189080 Fitzsimons births registered in Ireland, chiefly Dublin, Down and Cavan.[3]





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