William de Leyburn Lord Leyburn( - bef 12 Mar 1310) Ralph VII de Toni(1255 - bef 29 Jul 1296)
Juliane de Sandwich( - bef 1328) Mary( - aft 1283)
Sir Thomas de Leyburn Alice de Toni
b.  
d. bef 30 May 1307
dvp, dspm. On a Scots campaign.
b. abt 1283
d. 8 Jan 1325
Heir to bro. Robert.
Spouses: 1, 2, 3
Children