Alasdair is a distinctive boys' name in United States, ranking #4962 in 2019 with 19 recorded births. The name reached its all-time peak in 2021 with 37 births ranking #3178. Since 1996, the popularity has increased by 216.7%. In 2019, approximately 1 in every 94,387 boys born was named Alasdair. STABLE Recent data shows the name is currently stable.