Irrespective of parentage and their details there are 3 possible John Haylock/Harlock in 1841, b. c1833..
Civil Parish: Ely Trinity
County: Cambridgeshire
RD: Ely
ED: 5; Piece: 88; Book: 6; Folio: 4; Page: 10
William Haylock 40 [Bricklayer]
Mary Haylock 40
Ann Haylock 15
William Haylock 11
James Haylock 9
John Haylock 7
Mary Haylock 5
Joseph Haylock 3
Aaron Haylock 1
All BiC.
***
Civil Parish: Ely St Mary
County: Cambridgeshire
RD: Ely
Piece: 88; Book: 5; Folio: 6; Page: 6
Elizabeth Haylock 25 [Laundress]
John Haylock 8
Mary Haylock 6
All BiC.
***
Hundred: Staploe
County: Cambridgeshire
RD: Newmarket
Sub-RD: Soham
ED: 4; Piece: 73; Book: 16; Folio: 10; Page: 14
Sarah Harlock 30
Sarah Harlock 11
John Harlock 8
All BiC.
No obvious way of showing the marital status of Elizabeth or Sarah
Geoff
Civil Parish: Ely Trinity
County: Cambridgeshire
RD: Ely
ED: 5; Piece: 88; Book: 6; Folio: 4; Page: 10
William Haylock 40 [Bricklayer]
Mary Haylock 40
Ann Haylock 15
William Haylock 11
James Haylock 9
John Haylock 7
Mary Haylock 5
Joseph Haylock 3
Aaron Haylock 1
All BiC.
***
Civil Parish: Ely St Mary
County: Cambridgeshire
RD: Ely
Piece: 88; Book: 5; Folio: 6; Page: 6
Elizabeth Haylock 25 [Laundress]
John Haylock 8
Mary Haylock 6
All BiC.
***
Hundred: Staploe
County: Cambridgeshire
RD: Newmarket
Sub-RD: Soham
ED: 4; Piece: 73; Book: 16; Folio: 10; Page: 14
Sarah Harlock 30
Sarah Harlock 11
John Harlock 8
All BiC.
No obvious way of showing the marital status of Elizabeth or Sarah
Geoff