The name Calanthe is a girl's name meaning "Christmas orchid". Calanthe and is often added to lists like Gorgeous Flower Names for Babies and discussed in our forums with posts like "Quick Question Thread?!".
From the experts:
If you love Calliope and Callista, you'll love Calanthe, which combines the trendiness of the Greek 'cal' names with the equally fashionable "the" ending (like Xanthe and Evanthe) and a connection to the beautiful Christmas Orchid. Color Calantha one of the more unusual and exotic names for Christmas babies.