Alejo is a distinctive boys' name in United States, ranking #5584 in 2005 with 14 recorded births. The name reached its all-time peak in 2025 with 22 births ranking #4544. Since 1996, the popularity has decreased by 17.6%. In 2005, approximately 1 in every 142,653 boys born was named Alejo. RISING Recent data shows the name is currently rising.