William Borthwick, 1st Lord Borthwick

[2] He accompanied Henry, Bishop of Aberdeen, William, Bishop of Dunblane, John, Abbot of Melrose, James, Prior of St. Andrews, John, Abbot of 'Balmurynach', Sir William de Hay, knight, Master Thomas de Myrton, Master Edward de Lawedre, and Master John Stenes, all as Scots' ambassadors, with 50 attendants, setting out for the Court of Rome.

[3][4] Borthwick was sent in 1424 as hostage in England in the place of James I.

[11] He sat in the Parliament of Scotland under the title Lord Borthwick in 1455.

[12] Since the date of the first Lord Borthwick’s death is unknown, it cannot be stated with certainty whether he or his son, also William Borthwick, was the Scottish ambassador to England in 1459, 1461, 1463, and 1464–65.

His son John Borthwick, acquired the lands of Crookston, Midlothian, in 1446.