Long time since been on RootsChat and the same for family research!
Can tell you Samuel George's father William (1753-1829) was the brother of
my 3 x gt gf Samuel 1741-1822.
William your 3 x gf was baptised 29.03.1758 (late) at St. Mary's Yatton. He died 16.01.1829 and was buried At St. Mary's Yatton 22.01.1829.
You are correct in that William married Sarah Stallard on 19.12.1785 at Westbury on Trym. His occupation was Sexton.
His father was Jacob Avery born Yatton about 1703, baptised St. Mary's 24.01.1703 buried probably 26.10.1781 or possibly 6.10.1793 (a bit vague) Jacob married Mary. unknown, not listed in St. Mary's PR's so probably from another village.
Jaocb & Mary had the following children:-
Hannah bpt 2.04.1735 buried 12.10.1735 Yatton
Joseph bpt 17.12.1735, died 22.01.1815 of Pill age 81 buried in Easton in Gordano.
Cybile bpt 19.09.1736 burfied 15.04.1770 Yatton
Morris bpt 27.04. 1740, Christopher also same (twins?)
SAMUEL bpt 9.05.1743 buried 2.03.1822 Yatton
Sarah 2.06.1747 - 28.05.1748 Yatton
Sarah (Amelia?) 16.07.1749
Morris (the 2nd!?) bpt 21.09.1749 buried 24.09.1749 Yatton
WILLIAM born 1753? bpt 29.03.1758 died 16.01.1829 buried 22.01.1829 age 76 Yatton.
Going back further:-
Jacob's (24.01.1703) father was John Avery 1673-?
who married Jean Millard 10.06.1695. They had Rachel 1696, Sarah 1697,, Hester 1699, Susanna 1701, JACOB 1703 and Joseph 1706.
JOHN 1673 was the son of John Avery c1634 who married Ann unknown born c 1639 buried 27.04.1663 Yatton (wife of John) they had Susanna buried 30.04.1663 3 days after mother!. John remarried Susanna Millington 27.03.1667 Bristol, they had JOHN 26.08.1673. 2nd marriage is speculation (IGI Batch 7919434) no parish records available. There are records of John Avery's burials in Yatton of 1725 and 1729. No burial of Susanna (wife0 althouigh if born Bristol may have been buried there?
Hope of some help and not confused you too much!??
Regards
Bryan