Hi.
My 3 x great grandfather was William Smith. William and Margaret, nee Campbell, had 7 children who were baptised in St Helier, Jersey between 1817 and 1829. William Smith was listed as 'soldier' at 2 of the baptisms. Godparents of their first child, Jane (bap 3 Dec 1817) were Hugh and Ann Mitchell and John and Isabella Evans. William and Margaret, along with Hugh and Ann Mitchell, were godparents at the baptism of Margaret Evans, d/o John Evans and Isabella Skelton.
William Smith was baptised 7 May 1783 at St Ouen, Jersey. I can find no marriage between William and Margaret, but 1851 and 1861 census returns show Margaret as being born in Barbados and Jamaica, respectively. Margaret was down as a widow.
A Lucy Smith and an Ann Smith were godparents at baptisms of 2 of William and Margaret's younger children. An Ann Smith was born in Colchester in 1814 a "British Nationals Armed Forces" birth, regiment the 55th Foot. A Lucy Smith was born in 1807 in Jamaica, again of the 55th Foot Regiment. I have no confirmation that these were children of William and Margaret, but it seems likely and also possible/likely that it was in Jamaica that William met Margaret?