Dub Calgaid mac Laidcnén (died 769) was a king of the Uí Cheinnselaig of South Leinster.
He belonged to the Sil Chormaic sept of this branch of the Laigin and specifically to a branch which took over leadership of the Uí Dróna -the baronies of Idrone in modern County Carlow.
His last paternal ancestor to hold the throne was his great great grandfather Crundmáel Erbuilc (died 655)[1] He was the brother of Donngal mac Laidcnén (died 761).
The Uí Cheinnselaig became involved in a period of infighting and in 769 Dub Calgaid was defeated and slain at the Battle of Ferns by his successor Cennselach mac Brain (died 770) of the Sil Máeluidir sept.[2] This biography of a member of an Irish royal house is a stub.
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