Origen: Normando. The name Dalby was carried to England in the enormous movement of people that followed the Norman Conquest of 1066. The Dalby family lived in Lancashire. The name derives, however, from the family's former place of residence, Auby, Normandy, where they would have been referred to as D'Auby, meaning from Auby. First found in Lancashire where they were seated from early times.

Variantes: Dalby, Dalbie, Daylby, Dailby, D'Alby, D'Aubly y otros.

Motto: I hope in God.