Tamsin is a moderately popular girls' name in England & Wales, ranking #334 in 2000 with 101 recorded births. This places Tamsin in the top 6% of ranked UK girls' names for the year. Its actual usage is classified as Moderately Popular. The name reached its all-time peak in 1996 with 137 births ranking #271. Since 1996, the popularity has decreased by 26.3%. In 2000, approximately 1 in every 2,705 girls born was named Tamsin. FALLING Recent data shows the name is currently falling.