Lachlan is a distinctive girls' name in United States, ranking #10536 in 2025 with 9 recorded births. The name reached its all-time peak in 2020 with 23 births ranking #5408. Since 1996, the popularity has increased by 80.0%. In 2025, approximately 1 in every 178,585 girls born was named Lachlan. FALLING Recent data shows the name is currently falling.
Lachlan is a Scottish Gaelic name with a strong, flowing sound and a deep historical background. It is usually tied to the old Gaelic word used for Scandinavia or the land of fjords and lakes.
The name has long been used in Scotland and later spread through the wider English-speaking world. It feels distinctly Celtic while still sounding polished and modern.