Last year, April D. proposed merging duplicate profiles of Thomas' father. At the time, she said Tilley should be the LNAB, but then it was merged in the opposite direction with the comment that Tilly was the correct spelling.
Perhaps someone can look for additional sources (other than the will) to help determine the correct LNAB . . . I did a quick look and didn't come up with anything. We know later it was Tilley.