Gillian is a distinctive girls' name in United States, ranking #1037 in 2009 with 251 recorded births. The name reached its all-time peak in 1999 with 1,022 births ranking #303. Since 1996, the popularity has decreased by 33.8%. In 2009, approximately 1 in every 7,318 girls born was named Gillian. STABLE Recent data shows the name is currently stable.