Theon is a distinctive boys' name in England & Wales, ranking #977 in 2015 with 30 recorded births. This places Theon in the top 16% of ranked UK boys' names for the year. Its actual usage is classified as Uncommon. The name reached its all-time peak in 2016 with 34 births ranking #903. In 2015, approximately 1 in every 11,108 boys born was named Theon. FALLING Recent data shows the name is currently falling.