There are in fact five George Raymond Piddings in all, but only one Pidding convict.
Briefly, the line runs:
George Raymond (1800-53) m. Marianne Righton (d. 1872). She was the widow of Basil Righton of the East India Co. I don't know her maiden name; she was apparently French. George R.'s ten siblings included the painter Henry James P (1797-1864); the East India Co. captain and teadealer John Rhodes Pidding (1803-50) who sold his tea as "Captain Pidding"; the inventor William Pidding; and a surgeon, Thomas Pidding, who came to NSW free in 1829 and died there in 1840.
George and Marianne had two sons, as you know.
George Raymond (1824-93) married twice: in 1849 to Miriam Burgess (d. 1863) and in 1864 to Sarah Ann Davies (d.1824). Issue:
With Miriam Burgess:
George Raymond (1850-1902) Son George F.C. (George IV) b/d 1883.
Henry Augustus (1852-??)
Sarah Miriam (Young) (1854-1936)
Louisa Caroline (Eldridge) (1857-1921)
Eliza (Rutherford) (1860-1953)
Alfred (twin - b/d 1863)
With Sarah Ann Davies:
8. William Heath (1865-1898)
9. Frederick Ord (1866-1941)
10. Herbert James (1868-1942) (His third son was George Raymond L. [1893-1965])
11. Walter Burgess (1870-75)
12. Ida Eveline Maud (1873-74)
13. Percy Horatio (1877-1927)
14. Cecil Raymond (1881-1927)
15. Edis Byron (1884-1945)
Charles James (1826-1900) married Isabella Dodds (1829-1904) at Port Macquarie, 1848. She gave birth to ten children, only five of which survived:
George Raymond (1848-49)
Charles James (1850-53)
Isabella (Manning) (1853-1931) My great grandmother.
Margaret Mary (1858-59)
Elizabeth Louise (Kearton) (1860-
Margaret (Kearton) (1865-1904)
Douglas Francis (1870-1912). Doug's grandson, Noel Pidding, played Rugby League for Australia.