Seidy is a distinctive girls' name in United States, ranking #10284 in 2011 with 11 recorded births. The name reached its all-time peak in 2013 with 19 births ranking #6683. Since 1996, the popularity has increased by 83.3%. In 2011, approximately 1 in every 159,891 girls born was named Seidy. RISING Recent data shows the name is currently rising.