Alasdair is a moderately popular boys' name in England & Wales, ranking #365 in 1998 with 63 recorded births. The name reached its all-time peak in 1996 with 71 births ranking #335. Since 1996, the popularity has decreased by 11.3%. In 1998, approximately 1 in every 4,928 boys born was named Alasdair. STABLE Recent data shows the name is currently stable.