Zenas is of Greek origin and means 'zealous'. It was popular among early Christians, likely due to its biblical association with Zephyrinas, a companion of St. Paul mentioned in the Acts of the Apostles. Zenas has been used sparingly throughout history but gained some popularity during the Puritan era in England. Today, it is considered rare and unique.
"Zenas had a notable year in 1991 with five babies bearing this unique name."