John married Arabella Goodspeed on 13 Nov 1741 in ST Benet Pauls Wharf, London.
They had the following children:
2 M i Charles Sowerby was born 1 on 15 Feb 1750 in ST Dunstan in The West, London. He was christened 2 on 27 Feb 1750 in ST Dunstan in The West, London. 3 M ii Thomas Sowerby was born 1 on 12 Jun 1753 in ST Dunstan in The West, London. He was christened 2 on 30 Jun 1753 in ST Dunstan in The West, London. + 4 M iii James Sowerby 5 F iv Elizabeth Sowerby was born 1 on 4 May 1762 in ST Dunstan in The West, London. She was christened 2 on 26 May 1762 in ST Dunstan in The West, London. 6 M v William Sowerby was born 1 on 6 Jan 1760 in ST Dunstan in The West, London. He was christened 2 on 23 Jan 1760 in ST Dunstan in The West, London.