Bernard
No your not greedy

These are probably closest match for him, not in Llanvihangel Crucorney.
Ive found William & family on 1861, he's age 44. Falmer.
Ho107/748/6
Pencoed, Llangattock vibon avel, Mon.
James Cowles 65 falmer
Maria Lewes 25 f.s
WILLIAM BROWN 20 ag lab
William Williams 10 ag lab
All born in county.
Ho107/748/5
Cottage, Grosmont, Mon.
Mary Brown 53 b. out of county
WILLIAM ~ 25 cordwainer b. in county
John Walby 1 ~
1861 details
Rg9/3992
Crossway, Llangattock Lingoed, Mon.
William Brown 44 head falmer 52 acres b. Llangattock Lingoed
Margaret ~ 44 wife b. Llantillio Crossenny
Elizabeth ~ 17 dau falmers dau b. Llanvihangel Crucorney
Joshua ~ 10 son b. Cwmyoy Lower
Robert ~ 8 son scholar b. Llangattock Lingoed
Jane ~ 6 dau ~ ~
Leah ~ 4 dau ~ ~
Catherine ~ 1 dau ~
Regards Alison.