What I have: wife Grace Fenton b.29 Feb 1808 in N. Gwillumbury, York Co., Ontario, Canada. MARRIAGE DATE UNKNOWN ?
Samuel Goss emigration Aug. 29, 1829 N. Gwillumbury, York Co., Ontario, Canada. Son Thomas Randall Goss b.18 Dec. 1830 in N. Gwillumbury, York Co., Ontario, Canada. Thomas's Death record has father Randall. One marriage record father Samuel, another marriage record father Lemuel.
Son: John Fenton Goss b. Sept. 1831 or 1835 NY marriage record to 2nd wife Emma Stephens, states father; Samuel Goss. 1860 census Lewiston, Niagara, New York, USA: GOSS, John, Abigail, John 29, Abigail 36, Clara E. 5, Ann E. 2, Allice 6/12 & Lemuel Goss 61 NY."
|1829 Naturalization Record for Lemuel Goss|
Being curious, I brought up the two images for both of Thomas' marriages (on Ancestry) They both give his father as "Lemuel". It is very clear on both images
I next found the record and image for that 1829 immigration. It is LEMUEL Goss's Naturalization record, not his year of immigration. He no doubt immigrated some time before he naturalized. He lives in N. Gwillimbury as you said and the date is what you had. The difference is that the name on the image is LEMUEL, not Samuel. So you have three good primary records now that provide his name - Lemuel, not Samuel.
It's always important to verify indexes or transcriptions of records by viewing the actual record yourself. In this case you can see that there were several mis-transcriptions of Lemuel to Samuel.