Mairi is a distinctive girls' name in England & Wales, ranking #2788 in 2025 with 9 recorded births. This places Mairi in the top 37% of ranked UK girls' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 1998 with 13 births ranking #1392. Since 1996, the popularity has decreased by 18.2%. In 2025, approximately 1 in every 28,142 girls born was named Mairi. STABLE Recent data shows the name is currently stable.