Theodore is an extremely popular boys' name in England & Wales, ranking #8 in 2023 with 2,666 recorded births. The name reached its all-time peak in 2021 with 2,889 births ranking #11. Since 1996, the popularity has increased by 1,653.9%. In 2023, approximately 1 in every 104 boys born was named Theodore. STABLE Recent data shows the name is currently stable.