I think you may find he was born c1839 @ Ledburn, Bucks. Son of William & Hannah. Baptised in Mentmore, 14 July 1839. William & Hannah of Ledburn, at the time of baptism.
And through the census he's down as being born Mentmore.

Marriage @ Mentmore. 26 Jun 1822(by Banns). William(x) VARNEY, Bachelor otp . Susannah(x)KING otp.
Witnesses - John Varny, Maria Varney, George Varney.
They're not in my tree, but I have the
BucksFHS PR's for Mentmore.

It appears that William Varney(1839),
maybe with an Uncle George Varney(c1806) @ Mentmore, in 1841.
William Varney c1801. Mentmore, has been transcribed as
VANRY, by Ancestry in 1841.

Sussanah(Susan) & Hannah, seems to be the same person.
Burial @ Mentmore. 13 Jul 1850. Susanna VARNEY aged 52 of Redborough, Ledburn.
Burial @ Mentmore. 20 Dec 1882. William VARNEY, aged 82 of
Wingrave Mead.
Steve.
