Alasdair is a distinctive boys' name in United States, ranking #3618 in 2014 with 29 recorded births. The name reached its all-time peak in 2021 with 37 births ranking #3178. Since 1996, the popularity has increased by 383.3%. In 2014, approximately 1 in every 66,222 boys born was named Alasdair. STABLE Recent data shows the name is currently stable.