Tammy is a distinctive girls' name in England & Wales, ranking #529 in 1999 with 54 recorded births. The name reached its all-time peak in 1996 with 92 births ranking #364. Since 1996, the popularity has decreased by 41.3%. In 1999, approximately 1 in every 5,217 girls born was named Tammy. FALLING Recent data shows the name is currently falling.