Elizabeth St. Michael, in her free widowhood, resigns her lands of Whitchester, in the parish of Hawick and County of Roxburgh, into the hands of her superior, Archibald, Earl of Douglas,in 1399, and he immediately afterwards grants a charter of the same lands to her and her husband, Sir John De Maxwell of Pollok.
The family she represented was one of considerable note and antiquity.
Robert St. Michael is witness to a charter to Helias, son of Uchtred de Dundas ante 1153. In 1183, Henry Lovel,lord of Hawick, grants to the Chapter of St. Andrew's two oxengangs of land in Branxholm, formerly held by Walter de St. Michael. William de St. Michael witnesses charters 1185 and 1200. Robert de St Michael left a son, Elmeras, who, about the year 1240, resigns Ylistoun (at this period the Kers already hold a part of Ylistoun) to the abbot of Dryburgh; 1249, John de St. Michael is one of the witnesses of a charter of Agnes de Ilifistun to the abbey of Melrose; and Sir John de St.Michael and John de St.Michael, both of the county of Roxburgh, swore fealty to Edward I, at Berwick-upon-Tweed.
[from Notes on the Family of Kerr in Scotland- Herald and Genealogist]