Annus \a(n)-nus\ as a girl's name is a variant of Ann (Hebrew), and the meaning of Annus is "He (God) has favored me".
The baby name Annus sounds like Annis, Agnus, Annys and Annes. Other similar baby names are Agnes, Annise, Annisa, Annest, Annais, Anis, Anais, Anna, Anyu, Anouk, Anny, Annuska, Annie, Anni, Anne, Annet, Annah, Annot, Venus, Ennis, Innis, Annda and Innes.