Beatrice Sinclair Peerage person ID=145299 (b. 1394) Parents Henry I Sinclair, Earl of Orkney Jane Halyburton Children William Borthwick, 1st Lord Borthwick Janet Borthwick Siblings Jean Sinclair Elizabeth Sinclair Lady Mairi|Marjory Sinclair Margaret Sinclair Henry II Sinclair Helen Sinclair William Sinclair, 1st of Dryden