Seidy is a distinctive girls' name in United States, ranking #10554 in 2009 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 2009, approximately 1 in every 166,988 girls born was named Seidy. RISING Recent data shows the name is currently rising.