Further to Georges' info to you I have a bit more.
I have four son's to Gundry 1799 -1871 I don't have ages or dates but I have Edward,Joseph,Henry and George. Henry married Eliza Brown in Capetown S.A. they had four children, Alice who married ? Leather, Henry married Mary Battis? , Mary born and died in 1870 and Mabel.
Joseph James married Eliza Appleton who died in 1869 then married Helen Grace Darcy, JJ had the following children, Helen Susanne, Norton Joseph, Beavan Walter and Stacy Arthur.
Edward married Mary Ann Boyce Clark and had Harold Hutchinson and Winifred.
Edward appears in my family wheel as being in JJ's family but some of it is hard to decypher. Hope this is some help to you.