Arnon \a-rnon, ar-non\ as a boy's name is of Hebrew origin, and the meaning of Arnon is "torrent valley". Place name.
For more information, see also the related name Arnan.
A baby name that sounds like Arnon is Jernayn. Other similar baby names are Arron, Aron, Adnon, Amnon, Ardon, Arion, Aryon, Armon, Arnot, Arno, Arnow, Arnou, Arnoe and Arvon.