1871 Census
5 Evans Court,
Caernarvon, Caenarvonshire
William JONES, 29, Head, Labourer at Gas Works, born Bodedern, Anglesey, Wales
Letitia, 26, Wife
Owen, 5, Son
Ann, 2, Daug
William, 5mths
Leticia, 63, Mother, Widow, Annuitant
All but William born Caernarvan
Havent found William in 1861 yet but;
1861 Census
Pool Hill,
Llanlebig, Caernarvonshire
Leticia JONES, 55, Head, Widow, Mariners Widow
Leticia, 17, Daug, Boot Binder
+ 2 Boarders, Margaret Pritchard age 10 and Evan Pritchard age 8
All born Carnarvon
1851 Census in Pool St,
Llanbeblig, Caernarvonshire
Lettice JONES, 41, Wife, Mar, Seamans Wife, born Llanbeblig, Caenarvonshire
Hugh, 13, Son, Scholar, born Lancaster, Liverpool
Margaret Aunds?, 10, Daug, born Lancaster, Liverpool
Lettice, 7, Daug, born Llanbelig, Caernarvonshire
Looks like Leticia is Mother in Law to me not Mother as per 1871 Census.
Possible Marriage FreeBMD;
William JONES, June 1865, Bangor, 11b 988
Letuce JONES on same page