Bentleigh is an uncommon English given name derived from Old English words "beon" (to be) and "leah" (woodland clearing), meaning "settlement in a woodland clearing". It originated in Sussex, England, with roots tracing back to Bentilee, first recorded in the Domesday Book of 1086. Traditionally used as a surname, it has gained popularity as a given name since the late 20th century, particularly in Australia and the US.