Symphony is a Greek-rooted word name meaning "harmonious sound": from syn (together) and phone (sound), arrived in American naming as part of the grand, aspirational word-name tradition. With 3,111 SSA records and a 2022 peak, Symphony is the most ambitious name in the musical category: not just a note or a melody, but an entire orchestral work.
The Musical Word Name Tradition
English has a whole register of musical word names available to parents: Harmony, Melody, Lyric, Cadence, Aria, and Symphony. Each occupies a different point on the spectrum from gentle to grand. Symphony sits at the most expansive end: it implies complexity, multiple movements, the full range of an orchestra working together. Greek-origin word names that function in contemporary English carry their etymology invisibly; most bearers of Symphony won't think of Greek roots, but the meaning is there, built into the word itself.
Big Name, Big Life
There's something philosophically interesting about naming a child Symphony rather than Melody. Melody implies a single line of music; Symphony implies an entire composition: intricate, layered, requiring many voices. It's an ambitious name that projects a kind of grandeur onto a person's future. Harmony and Melody are the closest neighbors in this musical family; compare Symphony and Harmony to see two musical aspirational names at different popularity levels.
The Counter-Reading: A Lot of Name to Carry
Symphony is an uncommon choice that will require explanation in many contexts — it reads as a word first and a name second to most people encountering it. The question every parent of a word-name child eventually faces is whether their child will love the story behind their name or find it exhausting to explain. Eight-letter names at this level of uniqueness tend to attract children who grow into their name's boldness, or who go by Simi or Symph as teenagers.