Tamsin is a distinctive girls' name in United States, ranking #5957 in 2019 with 21 recorded births. The name reached its all-time peak in 2017 with 27 births ranking #5033. Since 1996, the popularity has increased by 200.0%. In 2019, approximately 1 in every 79,884 girls born was named Tamsin. FALLING Recent data shows the name is currently falling.