Hi again Kirsty,
Do you have access to Ancestry.Com?
I presume you have the M/C of Charles/Mary Jane 1881?
If not it names their Fathers as William Byfield, Occp Fitter and Joseph Ladds a Blacksmith.
1851 Census
Willm Byfield 26
Selina Byfield 25
Selina Byfield 5
Wm Byfield 3
Amelia Byfield 1
Edward Byfield 7 mths
1861 Census
Cottage next to 224,
Aston, Warwickshire
William Byfield 36 Head Mar Engine Fitter
Selina Byfield 35
Selina Byfield 15
William Byfield 13
Amelia Byfield 11
Edward Byfield 10
Joseph Byfield 7
Elizh Byfield 4
CHARLES Byfield 1****
1871 Census
William Byfield 47
Selina Byfield 47
William Byfield 24
Maria Byfield (Amelia) 22
Elizabeth Byfield 15
Joseph Byfield 18
CHARLES Byfield 12****
Henry Byfield 7
1881 Census
William Byfield 51
Selina Byfield 57
Joseph Byfield 27
CHARLES Byfield 21 Engine Fitter****
Henry Byfield 19
Kath Byfield 15 Neice
So 7 siblings for Charles by my calculations.
Marriage;
6 Apr 1845, Aston, St Peter and St Paul, Warwickshire
William BYFIELD Occp Engine Fitter, Father THOMAS Byfield a Labourer
Selina MARKES, Father ISAAC Markes a Carpenter
Both were Minors (under 21)
Both made their mark (did not sign)
If you want more it may be best to start a new query on the Warwickshire Board (add a link to this info so others dont go over what has already been found by me)
The reason is this was a query on the Northamptonshire Board and not related to your Byfields.
Also there is no need to quote info I have posted just ask you question as it just takes up space.
Trish