Theo is a highly popular boys' name in England & Wales, ranking #15 in 2021 with 2,514 recorded births. The name reached its all-time peak in 2022 with 2,808 births ranking #9. Since 1996, the popularity has increased by 1,995.0%. In 2021, approximately 1 in every 117 boys born was named Theo. FALLING Recent data shows the name is currently falling.