Harmonn \ha-rmo-nn, har-monn\ as a boy's name is a variant of Harman (French). See for meaning of Harmonn. The baby name Harmonn sounds like Harmon, Harmann and Harmony. Other similar baby names are Haroun, Haimon, Garmon, Garmann, Hardon, Harlynn, Harlenn, Harmen, Harmonio, Hartmann, Hermon, Hermann, Jarmann and Marmionn.