Duffin family tree

I have traced my direct line back to the marriage of John DUFFIN & Ann BRADFORTH in Howden on 15 Dec 1767.
Their son William DUFFIN married Mary FIELDER in South Cave on 28 Aug 1802. I have traced four sons for this couple,
John born 15 Oct 1804, William born 16 July 1807, Hopher born July 1810, and Fielder born November 1813, all christened in South Cave.

John married Elizabeth BIELBY, c1839, possibly in Nafferton. They had two daughters, Mary Anne born 11 April 1840, and Alice born 9 May 1842, both in Nafferton. Elizabeth passed away and John married Ann CROSBY on 6 Sept 1845 in Nafferton.
John and Ann had 9 children,
William born 12 Nov 1845, died 5 Feb 1890, married Betsey McLAREN 29 Dec 1872 in Nafferton.
Elizabeth christened 26 Nov 1848, married Thomas COATHAM
Eliza christened 5 July 1850, married William TAYLOR c1869.
Jane christened 11 July 1852.
Robert christened 13 Oct 1854.
Thomas christened 8 April 1858, died 1873.
Charles christened 14 April 1860, married Hannah c1880.
Mary Ann christened 27 March 1862.
Henry born 11 Aug 1863.

I have 8 children for William & Betsey, and question marks re two more.
Thomas born 26 Oct 1873 in Nafferton, married Hannah Maria BLAND
Annie born 11 Sept 1875 in Hull, married Harry MOULSON 26 June 1902. (Remaining children all born in Hull)
John born 17 Dec 1877, died 24 Dec 1947, married Isabell.
Robert born 14 June 1880, believed to have drowned at sea c1898.
Hannah born 28 Oct 1882, married August Adolph Benjamin THIEDE 3 May 1911 in Salt Lake City.
Alice born 12 Aug 1884, married Joseph BEBBINGTON.
Ethel born 9 Feb 1886, married John or Thomas REYNOLDS, married 2nd husband Franklin Waldamor COWLEY 1924 in Utah.
Harry, my grandfather, born 10 Aug 1889, married Alice Gertrude MEGGITT 4 Jan 1910, daughter Irene born 1910. 2nd marriage to Rose Harriet Hampshire HENNING my grandmother, 17 Jan 1925.

The other two children over which I have question marks are another daughter called Jessie or Betsey, for whom I have no information, other than family hearsay that she was the 3rd Duffin sister who emigrated to Utah.
Sarah Jane McLAREN born 22 April 1870 to Betsey nearly three years before she married William, question re fathers name.

Harry and Rose had six children, Ethel, Betsy May, Jean, Mavis, Patricia Rose, & Harry.
Betsy May married Maurice John GARTON in 1948, and I, the eldest of two sons was born in 1951.