Mhairi is a distinctive girls' name in England & Wales, ranking #3705 in 2025 with 6 recorded births. The name reached its all-time peak in 1999 with 20 births ranking #1018. Since 1996, the popularity has decreased by 64.7%. In 2025, approximately 1 in every 42,214 girls born was named Mhairi. RISING Recent data shows the name is currently rising.