1891 census
Main St, Somersham
William Bright head marr 45 coal agent b St Ives
Lissie Bright wife 33 b Woodhurst Hunts
Evangeline B Bright dau 8 scholar b Needingworth
Bertrande B B Bright son scholar b Needingworth
Olive B B Bright dau 5 scholar b Needingworth
Bernard B B Bright son 2 b Needingworth
Marguerita N? B B Bright dau 1
In 1881 which you will probably have checked on
www.familysearch.org there is William Bright 35 widower coal dealer born St Ives with children William 13, Elizabeth 10, Frances 8, Betsy 6, and Charles 4.
1871 census
Holywell cum Needingworth
William Bright head marr 27 farmer 25 acres b St Ives
Rebecca Bright wife 28 b Barley, Herts
William Bright son 3 b Needingworth
Phoebe Bright dau 10m b Needingworth
per FreeBMD
Marriage Sept quarter 1881 St Ives registration district William Bright and Mary Elizabeth Bentley
Death Sept 1/4 1878 Rebecca Bright
Birth Sept 1/4 1870 Elizabeth Phoebe Bright
Marriage Sept 1/4 1867 William Bright and Rebecca Prime
Do you have the marriage cert of William and Elizabeth Bentley - was he described as widower? It should also show his father's name, which may be:
1861 census Holywell cum Needingworth
High St
Frank Bright head marr 54 farmer 30 acres b Needingworth
Elizabeth Bright wife 55 b Needingworth
Frances Bright dau unmarr 21 b Needingworth
John Bright son unm 19 b Needingworth
William Bright son unm 16 b Needingworth
1861 census RG9/977 Folio 110
Church St Woodhurst
George Bentley head marr 36 potato dealer b Oldhurst
Charlotte Bentley wife 36 b Oldhurst
Mary E Bentley dau 3 b Woodhurst
This family appear in 1871 and 1881 - Mary Eliz aged 13 in 1871 and Elizabeth aged 23 in 1881.
I also have the 1841 census but before looking at that you may want to verify the above, as the William Brights in 1861 and 1871 may be totally wrong.
Regards
David