Bran (d. 838), son of Fáelán and overking of Leinster 835–8, was a member of the Uí Dúnlainge dynasty. He belonged in fact to the lineage of Uí Dúnchada, which had probably by this time established its base at Liamain (Newcastle Lyons, on the boundary of counties Kildare and Dublin). The Annals of the Four Masters mistakenly assign Bran to the related lineage of Uí Fháeláin. His father Fáelán achieved no great political prominence, but was in turn a son of Fínshnechtae Cetharderc (qv), a powerful provincial ruler.
In 835 Bran was set up as overking of Leinster by the king of Tara, Niall Caille (qv) of Cenél nÉogain, as part of an ongoing endeavour by the Uí Néill dynasties to assert their supremacy over Leinster. Bran was appointed to succeed his distant cousin Cellach, son of Bran Ardchenn (qv), who belonged to the rival lineage of Uí Muiredaig. The position of Bran was clearly insecure. He reigned in opposition to the claims of his uncle, Riacán son of Fínshnechtae Cetharderc, who died in 837. In that year the vikings, having earlier plundered Kildare, sent a fleet up the River Liffey and ravaged the surrounding plains. Bran died the following year, leaving at least two sons: Ruarc (d. 862), who later reigned as an ephemeral overking of Leinster, and Muiredach (d. 885), abbot of Kildare, who in the last year of his life also held the provincial kingship.