Tamsin is a distinctive girls' name in United States, ranking #8524 in 2013 with 14 recorded births. The name reached its all-time peak in 2017 with 27 births ranking #5033. Since 1996, the popularity has increased by 100.0%. In 2013, approximately 1 in every 125,315 girls born was named Tamsin. FALLING Recent data shows the name is currently falling.