Origin of the name AMBROSIUS.
Etymology of the
Meaning of the baby name AMBROSIUS.
form of Greek Ambrosios,
meaning "ever-living, immortal." Aurelius Ambrosius,
the brave Roman champion who so long withstood the Saxon invaders, left
his name to the Welsh in the form Emrys.
(History of Christian Names, Yonge, 1884)