Saint Albinus of Angers (c. 470 A.D. – March 1, 550) was a French abbot and bishop. He is called Saint Aubin in French. Aubyn seems to be a spelling variant of this. He is not be confused with Saint Alban, the early British martyr. Saint Aubin was born at Vannes in Brittany. He trained as a monk, became abbot of Tintillac (a place whose location is unknown) and was then elected bishop of Angers. A monastery dedicated to him grew up at Angers near the place where he was buried. Subsequently, the name Saint-Aubin was applied to many places in France where there were churches dedicated to the saint. The connection with this part of Belfast is unclear.
The Belfast And Province Of Ulster Directory 1899 lists St Aubyn Street with a few addresses.