Theory is a distinctive boys' name in United States, ranking #14048 in 2010 with 5 recorded births. This places Theory in the bottom 2% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2022 with 14 births ranking #6439. In 2010, approximately 1 in every 383,682 boys born was named Theory. RISING Recent data shows the name is currently rising.