Caittil Find (fl. 857) was the leader of a contingent of Norse-Gaels, recorded as being defeated in battle in 857 CE. 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. This view is however not shared by all.
The Annals of Ulster record that in 857 Caittil Find was defeated in battle in Munster, Ireland.
The name Caittil may be a Gaelicisation of the Old Norse Ketill. According to Alex Woolf, Ketill was a popular name at this period and it is not clear whether the Gaelic Caittil even represents this Norse name. Caittil's byname means "white" (or "fair") not "flat-nosed". Also, the Icelandic sources which document Ketill do not hint at his being active in Ireland. Ketill was the father-in-law of Olaf the White, yet Caittil is recorded as battling Amlaíb. Other historians propose that Caittil may have been active in Wales prior to his coming to Ireland.