Alasdair is a distinctive boys' name in England & Wales, ranking #1379 in 2020 with 18 recorded births. The name reached its all-time peak in 1996 with 71 births ranking #335. Since 1996, the popularity has decreased by 74.6%. In 2020, approximately 1 in every 16,055 boys born was named Alasdair. STABLE Recent data shows the name is currently stable.