Cid is a distinctive boys' name in United States, ranking #9292 in 2005 with 7 recorded births. This places Cid in the bottom 31% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2010 with 9 births ranking #8266. In 2005, approximately 1 in every 285,307 boys born was named Cid. FALLING Recent data shows the name is currently falling.