Alasdair is a distinctive boys' name in England & Wales, ranking #1448 in 2021 with 17 recorded births. The name reached its all-time peak in 1996 with 71 births ranking #335. Since 1996, the popularity has decreased by 76.1%. In 2021, approximately 1 in every 17,352 boys born was named Alasdair. STABLE Recent data shows the name is currently stable.