William Haslet Jones - William Tilton, His English Ancestors and some American descendants, Heritage 2000.
Jones cites the Leicestershire Record Office: LRO, 1542, #1. He reproduces both the will (21 Jan 1542/3) and the inventory (3 Feb 1542/3). Agnes Tilton executrix.
Will names brother Richard, sisters Alys and Agnes. Also children: Unborn?, William, John, Elizabeth.
Jones suggests unborn child may be Annis, which would make her birthdate 1543. That is, about fifty years later than the date given in the profile.
He also approximates William's birthdate as about 1500, which is more consistent with a child born in 1543 than supposing he was ninety years old.