Alasdair is a distinctive boys' name in United States, ranking #5651 in 1997 with 10 recorded births. The name reached its all-time peak in 2021 with 37 births ranking #3178. Since 1996, the popularity has increased by 66.7%. In 1997, approximately 1 in every 188,509 boys born was named Alasdair. STABLE Recent data shows the name is currently stable.