Name - "official" name and what they were known as
William Henry Benham
Date and place of birth
10th January 1837 Islington, Middlesex confirmed thanks to Wendy 
On the 1891 & 1901 census he gave 'Bawdsey, Suffolk' as his birthplace - his dad was living there at the time
in 1911 he gave 'Kelsale, Suffolk' as his birthplace - his mum was born there
Names of parents
William Benham & Elizabeth (Sillett)
Date and place of baptism - if applicable
9th August 1840 Islington with his brother George & sister Betsey (also confirmed thanks to Wendy)
Details of each of his or her marriages - if any
1st February 1864 at St Giles Cripplegate to Caroline Rebecca Payne
Occupation(s) - if any
now you've asked!
1861 - letter carrier
1864 - butcher - this is on his marriage cert, I can only imagine that it was a short-lived experiment
1871 - postman/letter carrier
1881 - Superannuated GPO
1891 - Caretaker
1897 - Caretaker of banks
1898 - Post Office pensioner
1901 - Night porter (bank)
1911 - Postal pensioner
1916 - Pensioned bank porter
Addresses where they lived (including county if in UK) - and please list which censuses you have or haven't found him/her on.
1840 - Richard Street, Islington (also from PR!)
1841 - Shepperton Street, Islington
1851 - 5 Norfolk Place, Islington
1861 - 13 Lansdowne Place, Bethnal Green
1864 - 8 Culford Road, Islington (on marriage cert)
1866 - 416 Hackney Road, Bethnal Green
1871 - Harrow Lane, Leyton, Essex
1873 - 11 Angle Street, Leytonstone, Essex
1881 - 77 Howard's Road, West Ham
1891-1911 - 53 Plaistow grove, West Ham
Date, place and cause of death
5th March 1916 Forest Geriatric Home, West Ham
'senility'
Date and place of burial / cremation.
unknown
Details of will / administration of their estate - if applicable
unknown
Memorial inscription - if any
unknown