Hi,
Please would sks look up any of these siblings taken from a family bible and all probably born in Mangotsfield but perhaps in Bitton, Oldland, Kingsland or St George - all appear to be dead by the 1871 census & none are in the 1851 censuses of Mangotsfield or Bitton:
Isaac BIRD b.16 Oct 1785, d.17 Sep 1856, spouse Mary
Mary BIRD b. 21 Feb 1788 - spouse, if any, unknown
George BIRD b. 16th Jun 1790
Charles BIRD b. 10 Aug 1795
William BIRD b. 9 Jun 1798
Love BIRD b.28 Dec 1801
Samuel BIRD b.12 Jun 1803
Thomas BIRD b.31 Jan 1806
James BIRD b.about 1807
Joseph BIRD b.about 1808
Isaac was definitely born in Mangotsfield and lived in St George around 1851 census, so he should be in that one.
Thank you.
Take care,
Paul