Gradon is an English locational surname, of a location now lost. It can also be spelt Graddon, Gratton, Gredan, Gredden, Gredon, Greydon, Greeding, Gridon and Grodden.
Notable people with this surname Alexander Gradon (1666–1739), Irish politician Margaretta Graddon (1804–?), British singer Sophie Gradon (1985–2018), English reality TV personality and former Miss Great Britain Simon Gredon, Archdeacon of Chichester
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