Harmonii is a modern American respelling of Harmony, the English word for "agreement" or "pleasing combination of sounds", which comes from the Greek harmonia. In Greek mythology Harmonia was the daughter of Ares and Aphrodite. The double-i ending gives the familiar virtue name a distinctive look; Harmonii has risen from number 4637 among US girls in 2015 to number 2678 in 2024 and stands at 2788 in 2025.