Welby \we(l)-by\ as a boy's name is of Old German origin, and the meaning of Welby is "well-farm". Place name. There was a popular tv series in the 1970s about a doctor named Marcus Welby.

Welby has 4 variant forms: Welbey, Welbie, Wellbey and Wellby.

Baby names that sound like Welby are Alby and Alba.