The name Emrys means Immortal and is of Welsh origin. Emrys is a name that's been used primarily by parents who are considering baby names for boys.
Emrys is a Welsh form of the name Ambrose.
Emrys Wledig was a Romano-British warlord, who was the uncle of King Arthur and Merlin Ambrosius, or Myrddin Emrys in Welsh, was the mythical wizard figure.
William Ambrose (Emrys) was a 19th-century Welsh language poet. Emrys Killebrew is a character in Marvel's Deadpool comics and there is a character named Emrys in the Throne of Glass book series by Sarah J. Maas.