Alasdair is a distinctive boys' name in United States, ranking #7441 in 2000 with 8 recorded births. The name reached its all-time peak in 2021 with 37 births ranking #3178. Since 1996, the popularity has increased by 33.3%. In 2000, approximately 1 in every 245,492 boys born was named Alasdair. STABLE Recent data shows the name is currently stable.