I am having to search my CD by Christian name 'Job' as the surname is spelt different ways.... and seeing by the census', Job was a Bricklayer. (1841 census, Gloucs. St Mary De Lobe Job EYNON - 45 Bricklayer)

Looks like the surname started off as ONIONS (or transcribed as)

Marriage: Gloucester St Mary De Crypt
21 November 1815 by Banns

Job ONIONS married Mary ALDER

CHILDREN

Sandhurst St Lawrence

ONIONS (Henrietta)

Parents: Job & Mary
Occupation: Bricklayer
Address: Sandhurst
Baptised 14 August 1816

so far in baptisms at Dymock St Mary

ONIANS (William)

Parents: Job and Mary
Occupation: Mason
Address: Dymock
Baptised: 11 July 1819 (on FOD records also as ONIONS) at Dymock

ONIONS (Jane)

Parents: Job and Mary
Occupation: Mason
Address: Bromsberrow Heath
Baptised 27 October 1822 (on FOD records also as ONIONS)

AYNONS (Ann)

Parents: Job and Mary
Occupation: Mason
Address: Broms Heath
Baptised : 10 April 1825 (on FOD records also as AYNONS)

London, England, Births and Baptisms 1813-1906
Westminster Christ Church - Marylebone

Jane Esther GABB - parents Jaz & Jane (Labourer) - 24 March 1832, 8 North? Street
(Jane married Robert HALES 2 April 1855)

James Frederick GABB - parents James & Jane - 9 February 1834, Carlisle Street
Harriet E GABB - ditto - 11 October 1835, Richmond Place (died 3 July 1836 - 10 months old)
Robert GABB - ditto - 19 November 1837, Salisbury Street
Georgina GABB - ditto - 21 June 1840 - Carlisle Street

re: Reuben Caleb SAUL

Reuben Kellep (Kelless) GABB (occ Stonemason - Bachelor - father James GABB) - married at Christ Church Marylebone - 7 September 1858 to Emma WATSON (Reuben died JFM Qtr - 1860, Marylebone)

possible 1851 census, Middlesex, St Paul, Convent Gardens
Langley Court, Model Lodging (but this one is a Clerk)

Reuben GABB - 21, Clerk, - born Middx. London