The Normans and De Sygens
This old castle, consisting of a square tower of considerable strength, is said to have been built by the old Anglo-Norman family of de Sygan. They had settled here after Strongbow’s invasion in 1172, and remained until 1641 when they were dispossessed in the Cromwellian Confiscations.
From A Topographical Dictionary of Ireland, 1837: The earliest mention I have of the family of Syggen is in the Memoranda Rolls, 16 Edw. III. 1342, when David fitz David, and Nicholas fitz Gerald de Rupe (Roche), Thomas Syggen and Adam Avereys were the sureties for Richard Whitty, formerly sheriff of the County, who were called on to produce him before the Barons of the Exchequer at Dublin, to render an account of his office. Where this Thomas Syggen lived or how long he and his ancestors had been in the County before this I cannot say.There is also a Thomas Sygens recorded in 1550.