Gillian is a distinctive girls' name in United States, ranking #3193 in 2023 with 51 recorded births. The name reached its all-time peak in 1999 with 1,022 births ranking #303. Since 1996, the popularity has decreased by 86.5%. In 2023, approximately 1 in every 31,424 girls born was named Gillian. STABLE Recent data shows the name is currently stable.