The Uí Cheinnselaig, from the Old Irish "grandsons of Cennsalach", were an Irish dynasty of Leinster who traced their descent from Énda Cennselach, a supposed contemporary of Niall of the Nine Hostages. Énda was said to be a grandson of Bressal Bélach and a first cousin of Dúnlaing mac Énda Niada, eponymous ancestor of the rival Uí Dúnlainge.

The earliest associations of the Uí Cheinnselaig are with the region around Rathvilly, County Carlow, and the headwaters of the River Slaney, but in time the centre of their power was pushed southwards, later being found around Ferns, in County Wexford, site of the monastery of Saint Máedóc (d. 626).

In early times the Kings of Leinster came from the Uí Cheinnselaig and the Uí Dúnlainge, but the Uí Dúnlainge came to dominate the kingship of the province, and after Áed mac Colggen (d. 738) it was three hundred years until the next Uí Cheinnselaig king of Leinster, Diarmait mac Mail na mBo.

Notable kings of the Uí Cheinnselaig and related kindreds included:


  • Byrne, Francis John, Irish Kings and High-Kings. Batsford, London, 1973. ISBN 0-7134-5882-8

This page uses content from the English language Wikipedia. The original content was at Uí Cheinnselaig. The list of authors can be seen in the page history. As with this Familypedia wiki, the content of Wikipedia is available under the Creative Commons License.