Donnchad mac Dómnaill Clóen was the tenth and last

King of Leinster The kings of Leinster ( ga, Rí Laighín), ruled from the establishment of Kingdom of Leinster, Leinster during the Irish Iron Age, until the 17th century Early Modern Ireland. According to Gaelic traditional history, laid out in works such as th ...

to be inaugurated and based on

Lyons Hill Lyons Hill or Lyons () is a townland and restored village in County Kildare. At a time when canal passenger boats travelled at Lyons was the nearest overnight stop to Dublin on the Grand Canal. On the hilltop is a trigonometrical point used ...

Ardclough Ardclough, officially Ardclogh (; ), is a village and community in the parish of Kill, County Kildare, Ireland. It is two miles (3 km) off the N7 national primary road. It is the burial place and probable birthplace of Arthur Guinness, w ...

County Kildare County Kildare ( ga, Contae Chill Dara) is a county in Ireland. It is in the province of Leinster and is part of the Eastern and Midland Region. It is named after the town of Kildare. Kildare County Council is the local authority for the county, ...

. He was a member of the Uí Dúnchada, one of three septs of the

Uí Dúnlainge The Uí Dúnlainge, from the Old Irish "grandsons (or descendants) of Dúnlaing", were an Irish dynasty of Leinster kings who traced their descent from Dúnlaing mac Énda Niada. He was said to be a cousin of Énnae Cennsalach, eponymous ancest ...

dynasty which rotated the kingship of Leinster between 750 - 1050 and is a significant figure in

County Kildare History County Kildare in the province of Leinster, Ireland, was first defined as a diocese in 1111, shired in 1297 and assumed its present borders in 1836. Its location in the Liffey basin on the main routes from Dublin to the south and west meant it w ...

. He was deposed in 1003.

Máel Mórda mac Murchada Malachy MacMurrough ( mga, Mael Mórda mac Murchada; modern ga, Máel Mórda mac Murchada; died 23 April 1014 AD) was King of Leinster, Ireland in the late 10th and early 11th century. Son of King Murchad mac Finn and brother of Gormflaith, he ...

of the Uí Fáeláin sept replaced him as king.

Primary Source

According to the

Annals of Tigernach The ''Annals of Tigernach'' ( abbr. AT, ga, Annála Tiarnaigh) are chronicles probably originating in Clonmacnoise, Ireland. The language is a mixture of Latin and Old and Middle Irish. Many of the pre-historic entries come from the 12th-cent ...

, in the year 999AD: * T999.1 Donnchadh son of Domhnall Claon, king of Leinster, was captured by Sitric son of Olaf. 11th-century deaths 10th-century kings of Leinster Year of birth unknown {{Ireland-royal-stub