William Borthwick, 1st Lord Borthwick Scottish peer and ambassador (1413–1483) Parents Beatrice Sinclair Sir William Borthwick of that ilk Children Agnes Borthwick Sir Thomas Borthwick Alexander Borthwick John Borthwick, 1st of Crookston James Borthwick Margaret Borthwick William Borthwick, 2nd Lord Borthwick Siblings Janet Borthwick Partners Mariota Hoppringle