1.William I the Lion, King of Scotland, d. 1214=Ermemgrde de Beaumont

2. (illegitimate by a daughter of Richard Avenal) Isabel of Scotland=Robert de Ros, Magna Charta Surety

3. Sir William de Ros=Lucy St. John

4. Sir William de Ros=Eustache FitzHugh

5. Lucy de Ros=Sir Robert Plumpton

6. Sir William Plumpton=Christiana Mowbray

7. Alice Plumpton=(1) Sir Richard Sherburne; (2) Sir John Boteler

8. (by 1) Margaret Sherburne=Richard Bayley

9. Richard Bayley alias Sherburne=Agnes Harrington

10. Richard Sherburne=Matilda Hamerton

11. Agnes Sherburne=Henry de Rishton

12. Nicholas de Rushton=Margaret Radcliffe

13. Agnes Rushton=Richard Worthington

14. Peter Worthington=Isabel Anderton

15. Isabel Worthington=Robert Worden (Werden)

16. Peter Worden of Mass=Mrs. Margaret Grice Wall

See Douglas Hickling’s message to soc.genealogy.medieval posted on May 24, 2004 which corrects Roberts’ RD600 line.