Clifford is a distinctive boys' name in United States, ranking #620 in 1999 with 293 recorded births. The name reached its all-time peak in 1996 with 356 births ranking #538. Since 1996, the popularity has decreased by 17.7%. In 1999, approximately 1 in every 6,553 boys born was named Clifford. RISING Recent data shows the name is currently rising.