Unity, concord, or a musical chord
Harmonee is a modern phonetic spelling of the English word 'harmony,' which derives from the Greek 'harmonia.' It signifies a pleasing arrangement of parts or a state of peaceful agreement. This specific spelling variation adds a contemporary, playful flair to the traditional musical virtue name.
Less common today
Harmonee isn't in the latest US Top 1000. It last peaked at #2,134 in 2013.
US births per 5-year period, 1990βpresent (SSA data).