Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
TRAYNOR
As described in historical dictionaries
Patronymica Britannica (1860)
TRAYNOR. The Osslanic hero, Finn Mac-Cool, was grandson of Trenmor or Treanmhar (pron. Treanwar) whence perhaps the surnames Treanor, Traynor, and, as Mr. Mac-Grady thinks, Mac Creanor.
Origin: Celtic
Region of origin: British Isles
Country of origin: Ireland
Religion of origin: Christian
Language of origin: Gaelic