John Baptiste Dubois married Frances Hayes Bell in 1781 at St Mary, Lambeth; both were from that parish. Two sons were christened at St Mary in 1782 and 1784. The records contain no detail of address or occupation.
He married again in 1796 to Alice Elizabeth Ottley. The record shows he was from St James, Clerkenwell parish.
A son was christened in 1797 at St James, Clerkenwell but again there is no detail of address or occupation.
His wife Alice Elizabeth's burial in 1831 aged 69 years is recorded at St Mary, Lambeth; her last address was Canterbury Place.
The 1841 UK Census for Lower Ranelagh Street, Hanover Square shows a J B Dubois aged 76 years of independent means. He had been born overseas.
A burial recorded at All Souls, Kensal Green Cemetery in 1847 of a John Baptist Dubose aged 82 years late of Somerset Street may be relevant.