Alasdair is a distinctive boys' name in United States, ranking #5339 in 2009 with 17 recorded births. The name reached its all-time peak in 2021 with 37 births ranking #3178. Since 1996, the popularity has increased by 183.3%. In 2009, approximately 1 in every 116,665 boys born was named Alasdair. STABLE Recent data shows the name is currently stable.