Sion is a moderately popular boys' name in England & Wales, ranking #430 in 2005 with 67 recorded births. The name reached its all-time peak in 2000 with 96 births ranking #285. Since 1996, the popularity has decreased by 16.3%. In 2005, approximately 1 in every 4,619 boys born was named Sion. RISING Recent data shows the name is currently rising.