John Stewart, of Pattishall is currently listed as the son of https://https://www.geni.com/people/Simeon-Steward-of-Lakenheath-and-Stuntney/6000000028121207714.
In The visitations of Northamptonshire made in 1564 and 1618-19, page 138, there is no mention of who the parents of John Stewart, of Pattishall are. He is only mentioned as the husband of Jane, heir of Hugh Pigg and the father of Nicholas Steward of Pattishall, Mary and John.
In The visitation of Cambridge made in 1575 Simeon Steward, of Lakenheath and Stuntney is given a son John: "Johannes Steward of Morsh in Norff. m .... d. & heire of ... Shouldham of Shouldham."
These John Stewards are not the same. John Steward, of Marham son of Simeon, has his will dated February 1604: https://www.geni.com/documents/view?doc_id=6000000213487663856
This is well after the death date of John Stewart, of Pattishall (1577) https://www.freereg.org.uk/search_records/5818bdfce93790ec7592b550/...
I suggest that the Pattishall Stewart family should be detached from the Lakenheath and Stuntney Stewards. John Stewart, of Pattishall parents are currently unknown, but they were not Simeon Steward, of Lakenheath and Stuntney and Joanne Steward .