Welsh form of Ambrose. Emrys Wledig (or Ambrosius Aurelianus) was a Romano-British military leader who fought against the invading Anglo-Saxons in the 5th century. Tales of his life were used by the 12th-century chronicler Geoffrey of Monmouth to create the character of Merlin, who he called Merlinus Ambrosius or Myrddin Emrys.
Derived from Greek ἥβη (hebe) meaning “youth”. In Greek mythology Hebe was the daughter of Zeus and Hera. She was a goddess of youth who acted as the cupbearer to the gods.