Sion is a moderately popular boys' name in England & Wales, ranking #326 in 1999 with 81 recorded births. This places Sion in the top 9% of ranked UK boys' names for the year. Its actual usage is classified as Moderately Popular. The name reached its all-time peak in 2000 with 96 births ranking #285. In 1999, approximately 1 in every 3,744 boys born was named Sion. RISING Recent data shows the name is currently rising.