A John Disney held land in Fosham, Yorks in 1431. He also held land in Croxton, Lincs. He was called John Disney the younger in 1422, so is likely the son/nephew of another John Disney.
This elder John Disney could have been the John Disney who held land in Fosham in 1415, and in Croxton in 1404. This John Disney was married to an Isabella.
He was probably the son or heir of the Thomas Disney who held land in Fosham in 1353 and 1367. Thomas' wife was called Maude, and she was heiress to land in Fosham and Magna Rouceby, Lincs.
Another John Disney held land in Croxton in 1303-1346. He was the brother of William Disney of Norton Disney, but the 16th Pedigrees say that he died without issue, so it is unclear where Thomas Disney might be related to him.