Some historians have considered him to be identical to Ketill Flatnose, a prominent Norse sea-king who had strong associations with the Hebrides of Scotland and Olaf the White.
The Annals of Ulster record that in 857 Caittil Find was defeated in battle in Munster, Ireland.
Roiniudh re n-Imar & re n-Amlaiph for Caittil Find cona Gall-Gaedelaibh h-i tiribh Muman.
[2] Ímar and Amlaíb inflicted a rout on Caitil the Fair and his Norse-Irish in the lands of Munster.
Caittil's byname means "white" (or "fair") not "flat-nosed", as Alex Woolf points out.