The main branch of the Bradley clan is of Celtic origin and is related to Irish county of Tyrone.
However, the Bradley family are also closely associated with the Scottish borders and are said to have settled there around the 13th century. This family are not related to the Irish clan but instead take their name from the lands of Braidlie in the barony of Hawick in Roxburghshire.
The first mention of this family comes in the 13th century when John de Bradely rendered homage to the invading King Edward II of England at Berwick. This would soon be followed by William de Bradeleye of the county of Roxburghe in 1296.