I agree that this Elizabeth Jones is the most likely person to have married Robert Gelling 11 Aug 1822, Braddan. They had 8 children:
1. Robert John 1823-1825
2. Robert 1826-1831
3. Edward 1828-1846
4. Henry 1831-1895. Md (1) Sarah Kneale 1853 - no children, she died 1884, then (2) Sabrina Corrin 1885 - 3 children born when he was in his 50s.
5. John 1833-? Age 17 joiner in 1851.
6. Jane 1835-1840
7. Robert 1838-? age 3 in 1841; doesn't appear again.
8. James 1840-1918. Md Margaret Lewin 1866 - 7 children.

Braddan burials: Robert Gelling Paper Mill Ballamillaghan bur Mar 23 1849 44 yrs.

1841 census at Mount Rule Paper Mill, Braddan HO107/1463/5 2 24 pg 99 (464355)
Robert GELLING 39 Paper Maker Y
Elizabeth GELLING 40 Y
Edward GELLING 13 Y
Henry GELLING 10 Y
John GELLING 8 Y
Robert GELLING 3 Y
James GELLING 9M Y

1851 census at Mount Rule at Paper Mill, Braddan HO107/2525 445 pg 14 #41
Elizabeth GELLING, Head Widow 52 B H E (?), b Isle of Man Patrick
John GELLING, Son U 17 Joiner, b Isle of Man Braddan
James GELLING, Son 10 Scholar, b Isle of Man Braddan

1861 census at Mount Rule Braddan RG9/4412 69 pg 20 #83 (543279)
Elizabeth GELLING, Head Wid 63 Mill Owner, b Isle of Man Douglas
James GELLING, Son Un 21 Joiner, b Isle of Man Braddan

1871 census at Mount Rule Paper Mill, Braddan RG10/5777 45 pg 18 #87
Elizabeth GELLING, Head Wid 74 Paper Mill Owner, b Isle of Man Patrick
Sophia COMAISH, Servant 15 General Servant, b Isle of Man Braddan

1881 census at Mount Rule Braddan
Elizabeth GELLING, Head W 84 Landowner, b Isle of Man Patrick
Mary ANDERSON, Serv Unm 16 General Serv (Domestic), b Isle of Man Douglas

Does not appear on 1891 census.

No burial on Brian's index
One of these could be her:
Will: GELLING, Elizabeth 1882 Bra A 63 0106494
Will: GELLING, Elizabeth 1886 Dgs 56 0106502