Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
TURTLE
As described in historical dictionaries
Patronymica Britannica (1860)
TURTLE. 1. A common surname in co. Antrim, supposed to be anglicized from the old tribe Hy Tuirtre (Tuirtre). 2. The name is ancient in England. It appears to be corrupted from Thurketil or Thurkettle, thus: Thurkel, Turkil, Turtel, Turtle. See H.R.
Surname type: Nickname
Origin: English
Region of origin: British Isles
Country of origin: England
Religion of origin: Christian
Language of origin: English