Janissa \j(a)-nissa, jan(is)-sa\ as a girl's name is a variant of Janessa (American). See for meaning of Janissa. The baby name Janissa sounds like Janiss, Anissa, Annissa, Janeesa, Janise, Janis, Jannessa, Janesse, Janicia, Janessia, Janess, Jenessa, Jinessa, Jonisa and Jonessa. Other similar baby names are Janisha, Jalissa and Vanissa.