Joannamarie is of Latin origin, derived from the combination of 'Joanna' and 'Marie'. It was quite popular during the late 20th century but has since become less common. The name is typically pronounced /dʒoʊˌænəˈmæri/ in English, with emphasis on the first syllable and a pronunciation similar to 'marry' for the second half.
"Joannamarie saw its peak popularity with 8 births in 1989 and has since remained consistently popular, with at least 5 births every year from 1997 onwards. Its total births over the recorded period are 58."