Marnia \m(a)-rnia, mar-nia\ as a girl's name is a variant of Marmara (Greek), and the meaning of Marnia is "sparkling, shining".

The baby name Marnia sounds like Marnie, Marni, Marna and Marnya. Other similar baby names are Marcia, Martia, Marsia, Maria, Markia, Marnja, Marnina and Tarnia.