Mabel is an English female name derived from the Latin amabilis, "lovable, dear". History. Amabilis of Riom (died 475) was a French male saint who logically would have assumed the name Amabilis upon entering the priesthood: his veneration may have resulted in Amabilis being used as both a male and female name, or the name's female usage may have been initiated by the female saint Amabilis of Rouen (died 634), the daughter of an Anglo-Saxon king who would have adopted the name Amabilis upon becoming a nun. .
https://en.wikipedia.org/wiki/Mabel