Alastair is a distinctive boys' name in England & Wales, ranking #888 in 2015 with 34 recorded births. The name reached its all-time peak in 1996 with 166 births ranking #195. Since 1996, the popularity has decreased by 79.5%. In 2015, approximately 1 in every 9,801 boys born was named Alastair. RISING Recent data shows the name is currently rising.