The name Mandolin is a girl's name of French origin. Mandolin and is often added to lists like Musical Baby Names and discussed in our forums with posts like "Hunt for our favourite girl names (Alphabet-wise)".
From the experts:
Mandolin may seem like an outlandish choice for a name, but since BANJO has been used as a baby name, all the instruments in the band seem to be auditioning for a place on birth certificates. This one comes with a real name nickname, MANDY.