Rosannah \r(o)-sannah, ros(an)-nah\ as a girl's name is a variant of Roseanne (English). See for meaning of Rosannah.
The baby name Rosannah sounds like Rosanna, Rosenah, Rozanna, Rossanna, Roseanna, Rosanne and Rosana. Other similar baby names are Sosannah, Hosanna, Josanna, Reannah, Roanna, Rohanna, Rosehannah, Rosanagh, Roxanna, Royanna, Sosanna and Susannah.