[2] Faelan is first mentioned in the annals when he defeated and slew Crundmáel Bolg Luatha of the Uí Cheinnselaig at the Battle of Duma Aichir in 628.
[4] The Book of Leinster gives him a reign of 30 years and his death obit of 666 in the annals appears to be an interpolation based on the king lists.
It is more probable that he died before 656 when Crundmáel Erbuilc mac Rónáin is called king of Leinster at his death obit.
[6] One of his wives was Sárnat ingen Echach of the Fotharta Fea, a tribe with connections to Saint Brigid of Kildare.
[7] The Irish saga Bóroma ("The Cattle Tribute") claims that the high king Sechnassach mac Blathmaic(died 671) of the Síl nÁedo Sláine led a large army to claim the cattle tribute from Laigin but was defeated by Faelan mac Colmain but this doesn't fit chronologically with Faelan's reign.