Tamsyn is a distinctive girls' name in England & Wales, ranking #1045 in 1997 with 19 recorded births. The name reached its all-time peak in 1998 with 20 births ranking #1036. Since 1996, the popularity has increased by 11.8%. In 1997, approximately 1 in every 15,431 girls born was named Tamsyn. FALLING Recent data shows the name is currently falling.