Idonia \i-do-nia\ as a girl's name is a variant of Iduna (Old Norse), and the meaning of Idonia is "loving one".

The baby name Idonia sounds like Adonia, Idania, Idona, Idonna, Idonie and Idonea. Other similar baby names are Ionia, Ilona, Tonia, Donia, Edenia, Idalia, Idina, Idone, Idonah, Idunna, Ilania, Ilonna, Iona, Ionie, Ivania, Ivonna, Sedonia, Sidonia, Sydonia and Vidonia.