The spelling of the word "Rosehannah" is determined by its pronunciation. In IPA phonetic transcription, it can be spelled as /roʊzhænə/, which indicates that the first syllable is pronounced with a long "o" sound followed by a "z" sound, the second syllable has a short "a" sound, and the third syllable has the schwa sound. The name is a combination of two names, Rose and Hannah. It is a unique and charming name that is gaining popularity among parents for their baby girls.