Josanna \j(o)-sanna, jos(an)-na\ as a girl's name is a variant of Jo (American) and Josephine (Hebrew), and the meaning of Josanna is "Jehovah increases".
The baby name Josanna sounds like Josanne, Josianna and Josana. Other similar baby names are Jovanna, Hosanna, Joanna, Johanna, Joeanna, Joyanna, Rosanna, Sosanna and Jolanna.