Alasdair is a distinctive boys' name in United States, ranking #3151 in 2015 with 36 recorded births. The name reached its all-time peak in 2021 with 37 births ranking #3178. Since 1996, the popularity has increased by 500.0%. In 2015, approximately 1 in every 53,229 boys born was named Alasdair. STABLE Recent data shows the name is currently stable.