Hi Andi,
Naomi’s marriage was in Shoreditch registration district in the September quarter 1867, so she had already moved down to London (
http://www.freebmd.org.uk/cgi/search.pl )
In 1861 Charles and family were living in Langford
RG9/997 folio 89A
The Pits, Langford
Charles Finch head married 27 ag lab b Southill
Mary Finch wife 23 Plaiter b Langford
Joseph Finch son 1 b Langford
Isaac Finch son 1 month b Langford
This looks to be the Joseph Finch in 1901, so I think you can rule out the Dunstable baptism.
In 1871
RG10/1552 folio 73A
The Crown public House, hamlet of Stanford, parish of Southill
Charles Finch head married 37 publican b Southill
Mary Finch wife 33 b Langford
Josh Finch son 11 scholar b Stanford
Isaac Finch son 10 scholar b Langford
Sarah Ann Finch dau 7 Scholar b Langford
Ruth Finch dau 5 scholar b Langford
Fanny Finch dau 2 b Stanford
The following baptisms appear on the BVRI in Langford, parents Charles and Mary Finch
Isaac William Finch
Josh Finch
Naomi Finch
Ruth Finch
Sarah Ann Finch
All 21 Jan 1866
The same parents at Southill
Arthur Finch
Fanny Elizabeth Finch
Fred Finch
Mary Jane Finch
All 18 June 1876
Henry Finch
Jonathan Finch
Thomas Finch
Last three on 6 May 1883
I suspect that Josh may be a mistranscription for Joseph where it is abbreviated to Jos with a small h.
More later – got an appointment with a barman now.
Regards
David