Derby, Margaret Beaufort, Countess of Richmond and, 1443-1509
Margaret, Lady, 1443-1509
Richmond and Derby, Margaret Beaufort, Countess of, 1443-1509
Richmond, Margaret Beaufort Tudor, Countess of, 1441-1509
Notes:
Simon, L. Of virtue rare, c1982 (subj.) t.p. (Margaret Beaufort) CIP galley (b. 5/31/1441, d. 1509)
Cokayne, G. E. Complete peerage, 1945, v. 10, p. 827 (Richmond, Margaret Beaufort, b. 5/31/1443, d. 1509; Countess of Richmond and Derby)
Encyc. brit., 1972 (Beaufort, Margaret, 1443-1509; m. to Edmund Tudor, Earl of Richmond; later m. Thomas Lord Stanley, afterward Earl of Derby)
Cooper, C. H. Memoir of Margaret, Countess of Richmond and Derby, 1874 t.p. (Margaret, Countess of Richmond and Derby)
Routh, E. M. G. Lady Margaret, a memoir of Lady Margaret Beaufort, Countess of Richmond & Derby, mother of Henry VII, 1924 t.p. (Lady Margaret Beaufort, Countess of Richmond and Derby) p. 12 (b. 5/31/1441)
Info. from Cambridge Univ. Press, 11-14-91 (correct d.o.b. for Lady Margaret Beaufort is 1443)
