I have information on both William & John. They were brothers, born at Gunthorpe. William was christened 26 Oct 1851 at Lowdham. John was christened 16 Jan 1848 also Lowdham. He married Emily Lauday at Lowdham 7 Oct 1872.He died 28 Jan 1914 and is buried in Lowdham churchyard where there is a headstone. William married Phebe Carolishaw, aged 20, on 5 Oct 1874 at Lowdham. William & Johns parents were William Widdowson Christened Lowdham 30 Nov 1811, and Hannah Allwood who married at Lowdham 8 Oct 1838. Williams parents were Richard Widdowson and Sarah Branstone who married 12 Feb 1811 at Lowdham. Richard is my G/G/G Grandfather.
Does any of this fit with information you have. If you think these are the right people, I have information going further back.