Re: Thomas NEARY marrying Hannah DAVIS - 20 January 1850 All Souls St Marylebone

assume you have access to the actual copy on Ancestry

Hannah's father given as William DAVIS - farmer (later census she says she was born in Bream, Gloucestershire)
Thomas's father was Walter NEARY - Bootmaker.

Just to show you how people changed their names for whatever reason in census returns - here is my x Grandparents

1871 Census, Blakeney Road Glos with their son, William WICKENDEN

William WICKENDEN - 26 - Butcher, born Rendcombe
Blanche WICKDENEN - 2 - daughter - born Blakeney
William WICKENDEN - father - 57 - born Coln St Aldwins
Margaret WICKENDEN - mother - 49 - born Rendcombe

by the 1881 census, William & Magaret had moved to Swindon, Wiltshire

William GREEN - 58 - Railway labourer, born Coln St Aldwins
Margaret GREEN - 56 - born Rendcombe
Martha WICKENDEN - grand-daughter- 5 -born Ruardean

they also call themselves GREEN 1891 census (a family surname)

1891 Census, Swindon, Wiltshire

William GREEN - 72, Warehouseman - born Glos Rendcombe
Margaret GREEN - 68 - born Glos. Rendcombe
Susan GREEN - sister - 65 - born Coln St. Aldwyn
John WICKENDEN - lodger - 41 - Railway Clerk, born Rendcombe (this is their Son my x Great Uncle)
William WICKENDEN - 17 - lodger - Machineman - born Blakeney (this is my Grandfather)

Their death certificates give their correct surname..