Theodor is a distinctive boys' name in England & Wales, ranking #606 in 2025 with 63 recorded births. This places Theodor in the top 10% of ranked UK boys' names for the year. Its actual usage is classified as Uncommon. The name reached its all-time peak in 2021 with 76 births ranking #514. Since 1996, the popularity has increased by 2,000.0%. In 2025, approximately 1 in every 4,316 boys born was named Theodor. RISING Recent data shows the name is currently rising.