Family History

I am trying to find the grave site for my Gt,Gt grandfather William ( Bill) Garner.

William wife died in 1908 and is buried at St Nicholas at Eydon, but no mention of William.

William and two of his children Samuel and Walter,along with Samuel's wife Florence are on the 1911 census , living in Eydon.

Their is a mistake in William's age in the 1911 census, as he was born in 1843 at Brackley.

Would any one know when the family left Eydon as Samuel moved to Oxford and died their c 1960's also Florence is their also. Samuel and Florence appear in the 1939 Registar. but no William.

Walter remained in Eydon for how long I don't know?

Also would anyone know what the name of the area is for the electoral rolls for Eydon, as I don't live in England and would like to search for William in the electoral rolls Is it Northampton South division ?

Thanks

Jean Taylor

New Zealand