Robert Williams, Dictionary of National Biography… (1891)
“ Howel's father died in 1169. According to the version of 'Brut y Tywysogion,' printed in the 'Myvyrian Archæology,' Howel, as Owain's eldest son, thereupon seized the government and kept possession of it for two years. During his absence in Ireland, looking after certain property which came to him in right of his mother and wife, his brother David rose up against him. Howel returned, but he was defeated, wounded in battle, and taken to Ireland, where he is said to have died in 1170, leaving his Irish possessions to his brother Rhirid. ”
