Theodore is a highly popular boys' name in England & Wales, ranking #11 in 2021 with 2,889 recorded births. The name reached its all-time peak in 2021 with 2,889 births ranking #11. Since 1996, the popularity has increased by 1,800.7%. In 2021, approximately 1 in every 102 boys born was named Theodore. STABLE Recent data shows the name is currently stable.