In the Hebrew Bible the title of this book is "The Song of Songs."It comes from 1:1. The Septuagint and Vulgate translators adopted this title. The Latin word for song is canticumfrom which we get the word Canticles, another title for this book.
Some English translations have kept the title "Song of Songs"(e.g., NIV), but many have changed it to "Song of Solomon"based on 1:1 (e.g., NASB, AV, RSV, NKJV).
