Hi Joan,
I had a bit of a break through on this. John Strange's five youngest siblings were, according to the IGI, all born in Aldbury, Hertfordshire. Therefore, it seems that John must share the same mother and father - they are shown as John Strange and Mary.
The next question is which Mary did father John marry? I have looked through many records from Hertfordshire and surrounding counties and have found just one reference which seems to tie up:
Edlesborough St Mary the Virgin
From John Moore
Marriage:
1809 Nov 09 John Strange to Mary Wilkinson
John (junior) was born (in Bedfordshire) in Jun 1811 so it could fit but we cannot be sure - no real proof. There may be many other records that haven't yet been transcribed or, even, that family might have come from far afield.
Going further back I found the following:
Wing All Saints
From: John Moore and Ed Hanson
(1546-1812)
Baptisms:
1779 Dec 19 John Strange s William Strange Mary
Again, it might fit but no real proof.
Any thoughts?
Cheers,
Dave.