Latest portrait: Who is the sitter?

[artlover123]

Dear Friends,

Please find photographs below of the front and back of a portrait I have recently acquired. I am at a loss regarding the sitter despite the information provided on the back of the painting. It was catalogued as Colin Campbell (British Army officer, born 1776), however, I don't believe this to be correct given the names of the sitter's relations present, also his being Royal Navy. There are some interesting leads on first searches and any help would be most appreciated!

Best wishes,

Joshua

[artlover123]

PS

[Kay99]

I think this may be his son's marriage  https://www.familysearch.org/ark:/61903/1:1:QLS4-MV12

The press notice states that his father Captain Colin Campbell was from Spa, Gloucester and in 1841 Colin Campbell Capt RN age 60 born Scotland was living in Littleworth Gloucester  with wife Elmira

Kay

Added - Looks like he died in 1842 and his will is on Anc and his wife's will  1843 which is much more detailed is also on Anc
Name:    Colin Campbell Esq
Residence:    Littleworth, Gloucestershire, England
Probate Date:    5 Dec 1842

[Kay99]

Marriage Walcot Somerset 9 Dec 1823
Colin Campbell  Capt in Royal Navy - Widower to Elmira Gore - Widow

Kay

[mckha489]

Marriage Walcot Somerset 9 Dec 1823
Colin Campbell  Capt in Royal Navy - Widower to Elmira Gore - Widow

Kay

Widow of the late Lieut, General Richard Gore.

[mckha489]

Wonder if this is them.

11 September 1828 - Sun (London)

Or is it the younger Capt Colin Campbell RN who appears a lot? (Not related as far as I can see) and I think married 1847.

[mckha489]

Then there is this Colin Campbell RN

29 September 1836 - Caledonian Mercury

[mckha489]

The Ardpatrick one someone else?

30 June 1827 - Durham County Advertiser

[Kay99]

John Campbell   21 Apr 1831
Marriage Place  South Hamlet, Gloucestershire
Spouse:    Jane Smith Stone

This may be the couple in 1861 living in Hastings   John is listed as a retired Capt in HM Indian Army
 
John Campbell  56 Stepney, Middlesex
Jane Campbell Wife 64 Dorton, Buckinghamshire
Eliza A A Stone Niece 21 Brendon?? Buckinghamshire
https://www.familysearch.org/ark:/61903/1:1:M7T7-QKY

And 1881 https://www.familysearch.org/ark:/61903/1:1:Q27J-6S4S

Kay

Added - Eliza A Stone living with the family as a niece 1861 married  James Taylor 7 Apr 1863 at St.Stephens, Westbourne Park and I think in 1881 she was living in Oxford with her family including son Colin which ties in the detials on the back of the portrait https://www.familysearch.org/ark:/61903/1:1:Q27H-TS87