"Form of Harmony"
The name Harmonii is commonly a female name from the "Greek" origin.
Harmonii is a respelling of Harmony, the English word name taken from the noun for agreement or concord. The spelling replaces the final y with ii, a pattern also seen in other modern American respellings, while the derivation from the word is unchanged. The English word comes through Latin harmonia from Greek harmonia, meaning a joining or fitting together.
Harmony means "Harmony".
The pronunciation of Harmonii is HAR-muh-nee.