Alasdair is a distinctive boys' name in United States, ranking #5747 in 2010 with 15 recorded births. The name reached its all-time peak in 2021 with 37 births ranking #3178. Since 1996, the popularity has increased by 150.0%. In 2010, approximately 1 in every 127,894 boys born was named Alasdair. STABLE Recent data shows the name is currently stable.