Margaret Borthwick Peerage person ID=145419 (1430–1464) Parents William Borthwick, 1st Lord Borthwick unknown wife (?) Children Sir John Maxwell of Calderwood Marion Maxwell, of Calderwood George Maxwell, 2nd of Newark Siblings John Borthwick, 1st of Crookston Agnes Borthwick William Borthwick, 2nd Lord Borthwick Alexander Borthwick Sir Thomas Borthwick James Borthwick Partners Sir John Maxwell, 5th of Calderwood and 1st of Newark