Sion is a distinctive girls' name in United States, ranking #15501 in 2003 with 6 recorded births. This places Sion in the bottom 16% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2008 with 12 births ranking #9999. In 2003, approximately 1 in every 304,508 girls born was named Sion. FALLING Recent data shows the name is currently falling.