Alastair is a distinctive boys' name in England & Wales, ranking #1273 in 2020 with 20 recorded births. The name reached its all-time peak in 1996 with 166 births ranking #195. Since 1996, the popularity has decreased by 88.0%. In 2020, approximately 1 in every 14,449 boys born was named Alastair. RISING Recent data shows the name is currently rising.