Gillian is a distinctive girls' name in United States, ranking #1154 in 2010 with 211 recorded births. The name reached its all-time peak in 1999 with 1,022 births ranking #303. Since 1996, the popularity has decreased by 44.3%. In 2010, approximately 1 in every 8,423 girls born was named Gillian. STABLE Recent data shows the name is currently stable.