Alasdair is a distinctive boys' name in United States, ranking #6538 in 1999 with 9 recorded births. The name reached its all-time peak in 2021 with 37 births ranking #3178. Since 1996, the popularity has increased by 50.0%. In 1999, approximately 1 in every 213,343 boys born was named Alasdair. STABLE Recent data shows the name is currently stable.