Wallie is a unisex given name of Scottish origin, derived from the surname Wallace, which was originally an occupational name for a weaver or wall maker. The name gained popularity in Scotland following the Battle of Stirling Bridge in 1297, where Sir William Wallace led his forces to victory against the English.
The name Wallie appears to have been quite popular between the late 19th and mid-20th centuries, with a peak in the 1920s and early 1930s, before tapering off significantly by the mid-20th century. However, there was a notable resurgence in its use in the year 2004.