I assume Hannah Evans died and he remarried Ann, unless unusually Ann is shortened version of Hannah.
I think Hannah/Ann Evans nee Gibbs are one and the same BUT there is a daughter named Sarah Ann born Chew Magna c1858, haven't found a birth entry on GRO indexes yet, or for William & Amelia
Perhaps there is another Evans family with similar names, born around same time - will recheck
John, George, Ellen, Frank & Bertie all have mmn GIBBS
John & Hannah Gibbs married 1862, index marriage says both were single
2 Prospect Place Clifton Bristol
John Evans 33 Chew Magna, milkman
Hannah Evans 34 Somerset
Sarah Ann Evans 13 Chew Magna
William Evans 9 Clifton
John Evans 5 ''
George Evans 3 ''
Ellen Evans 1 ''
Lucy Mackell 49 lodger
1871 RG10; Piece: 2544; Folio: 6; Page: 3;
I think this is John Evans born Chew Magna c1838 on earlier censuses
‘’White Hart’’ Upper Park Row
Jones (James) Fear 38 Chew Magna Dairyman
Ann E Fear 37
James W Fear 13
George H Fear 11
Alfred C Fear 9
Elizabeth H Fear 6
Emily M A Fear 3
Amy J Fear 10 mths
John Evans 23 Chew Magna lodger, labourerMaria Curnock 15
1861
I haven’t found John Evans Jr. born Chew Magna on 1851 census
he's not with his family
John Evans 32 Radstock, Somerset
Ann Evans 49 Stanton Drew, Somerset
Fanny Evans 17 Chew Magna, Somerset
Mary A Evans 9 Chew Magna, Somerset
William Evans 11 Chew Magna, Somerset
James Evans 7 Chew Magna, Somerset
Jemima Evans 5 Chew Magna, Somerset
1851 HO107 1938 / 233 / 17
Chew Magna Somerset
John Evans 25 Farmer
Ann Evans 35
Geo’e Evans 9
Fanny Evans 7
John Evans Jr 3 William Evans 1
Betsy Evans 65 Ind.
All born in this county
1841 HO107; Piece: 938; Chew Magna Somerset; ED 5; Folio: 10; Page: 14
EVANS, JOHN
mmn BAKER 1837 S Quarter in CLUTTON Volume 11 Page 73
The district Clutton is in the county of Somerset and Chew Magna is in Clutton registration district
John Evans bp. 15 Oct 1837 Chew Magna, Somerset
John Evans, Farmer mother Ann
William, Jemima & James Fear Evans mmn is also BAKER
possible marriage
John Evans, widowed spouse Ann
Baker, single
11 Apr 1837 St. Mary'S Church Redcliffe, Bristol, Gloucester, England