I think that this maybe where your Eliza fits in. Right at the bottom of this tree.
First Generation
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1. John NETHWAY. Born abt 1750 The earliest Nethway livining in Yatton 1650 was a William.
In 1777 when John was 27, he married Hannah MARSHALL, in Kenn? Born in 1758 in Kenn? Died in Kenn? aged 64 in 1822.
They had the following children:
2 i. John (~1778-)
3 ii. Hannah (~1781-)
4 iii. William (1781-1831)
5 iv. Nancy (~1787-)
6 v. Betsey (~1789-)
7 vi. Mary (~1793-)
Second Generation
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2. John NETHWAY. Born abt 1778.
3. Hannah NETHWAY. Born abt 1781.
4. William NETHWAY. Born in 1781. Died in 1831, he was 50.1 Buried in 1831. Occupation: Ag.Lab.
Banns read at Yatton:Sun 5 Mar 1809: 12 Mar 2 April 1809 marr 16 Apr 1809. both x'd Wit: Thos Gallop: Wm Avery
On 16 Apr 1809 when William was 28, he married Hester BAKER, in Yatton. Born abt 1784. Buried in 1835.
They had the following children:
8 i. William (~1810-1858)
9 ii. Thomas (~1807-)
10 iii. Eliza (~1807-)
5. Nancy NETHWAY. Born abt 1787.
6. Betsey NETHWAY. Born abt 1789.
7. Mary NETHWAY. Born abt 1793 in Yatton.
Third Generation
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8. William NETHWAY. Born abt 1810 in Yatton. Died in Yatton in 1858, aged 49 years. Buried on 15 Jul 1858 in Yatton. Occupation: Railway Labourer.
On 7 Aug 1838 when William was 28, he married Eliza GOSLING, [MY GG Grandmother], daughter of Elisha GOSLING (1770-20 Apr 1855) & Sarah VOWLES (abt 1772-), in St Mary Redcliffe, Bristol. Born in 1807 in Yatton. Died in Horsecastle, Yatton, Soms. [GRO 5c 515] on 31 Mar 1883, she was 76. Buried in 1883 in Yatton. Occupation: Laundress. Eliza brought up my Great Grandfather Henry KNIGHT - her daughter's child.
They had the following children:
11 i. George (1838-1840)
12 ii. Amy Jane (1839-)
13 iii. Eliza Jane (1840-)
14 iv. William Henry (~1844-)
15 v. Charles Robert (1846-1870)
9. Thomas NETHWAY. Born abt 1807 in Kenn.
10. Eliza NETHWAY. Born abt 1807.