Lower, Mark A (1860) Patronymica Britannica: a dictionary of the family names of the United Kingdom. London: J.R. Smith. Public Domain.
WALDIE
As described in historical dictionaries
Patronymica Britannica (1860)
WALDIE. This family, long settled near Kelso, co. Roxburgh, have at different times written themselves Waitho, Watho, Waltho, and Waldie. The etymology is unknown. Mr. Ferguson makes it the same as the Scandinavian name Valdi.
Origin: Celtic
Region of origin: British Isles
Country of origin: Scotland
Religion of origin: Christian
Language of origin: Gaelic