Avrina, a very warm welcome to Rootschat.
I'd arrived at John as a possible brother via -
FindMyPast burial - John Siely, age 84, abode Stalham, date 29 Mar 1842 (calc. year of birth 1758)
History, Gazetteer and Directory, Norfolk, 1836
"Stalham, John Siely, Surgeon"
FindMyPast baptisms to parents John & Elizabeth Sillie
John, bap 19 Dec 1758, parish Aylsham,
Andrew, bap 29 Nov 1765, Walcot
Hannah, bap ? Nov 1770, Walcot
James, bap 1 Oct 1775
Is John, bap Aylsham the brother of Andrew, bap Walcot?