Wilmor is of Old English origin, derived from 'Willa' meaning 'willow' and '-munde', signifying 'protection'. It was first recorded as a given name in the Domesday Book of 1086. Wilmor gained prominence during the Middle Ages but has since become quite rare.
The name Wilmor was quite popular in 1937 with 5 births that year. However, it has not gained widespread usage as there are only a total of 5 people named Wilmor altogether.