Valley of the white grass
Candon is likely a variant of the English surname Camden, which derives from Old English elements meaning 'enclosed valley' or 'valley of the white grass'. It may also be influenced by the Irish surname Candon, an anglicized form of the Norman name de Caunteton. As a first name, it is rare and offers a modern, rhythmic alternative to more common 'n' ending names.
Less common today
Candon isn't in the latest US Top 1000. It last peaked at #5,804 in 1990.
US births per 5-year period, 1990βpresent (SSA data).