Seidy is a distinctive girls' name in United States, ranking #9187 in 2006 with 13 recorded births. The name reached its all-time peak in 2013 with 19 births ranking #6683. Since 1996, the popularity has increased by 116.7%. In 2006, approximately 1 in every 146,236 girls born was named Seidy. RISING Recent data shows the name is currently rising.