Wei is a distinctive girls' name in United States, ranking #20422 in 2007 with 5 recorded births. This places Wei in the bottom 1% of ranked US girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 1999 with 6 births ranking #14353. In 2007, approximately 1 in every 384,490 girls born was named Wei. FALLING Recent data shows the name is currently falling.