Ottilia \o-tti-lia\ as a girl's name is a variant of Otthild (Old German) and Ottilie (French), and the meaning of Ottilia is "prosperity in battle".

The baby name Ottilia sounds like Attilia, Ottila and Ottalia. Other similar baby names are Ottavia, Odilia, Ophilia, Ofilia, Otylia, Ottiline, Otthilda and Ottolie.