Tamsin is a distinctive girls' name in England & Wales, ranking #3333 in 2025 with 7 recorded births. The name reached its all-time peak in 1996 with 137 births ranking #271. Since 1996, the popularity has decreased by 94.9%. In 2025, approximately 1 in every 36,183 girls born was named Tamsin. FALLING Recent data shows the name is currently falling.