Angelos first became a name in the Byzantine Empire.  It probably began as an epithet, since it comes to light in the person of Konstantinos Angelos, a young man of a noble family of Philadelphia, whose personal beauty caused him, about the year 1100, to become the choice of the Princess Theodora Komnena.  It is thus highly probable that Angelos was first bestowed as a surname, on account of the beauty of the family.  They were on the throne in 1185, and Angelos continued imperial till the miserable end of the unhappy Isaac, and his son, Alexios, during the misdirected crusade of the Venetians.  Angelos thus became known among the Greeks; and somewhere about 1217, there cam a monastic saint, so called, to Sicily, who preached at Palermo, and was murdered by a wicked count, whose evil doings he had rebuked. (History of Christian Names, Yonge, 1884)