Cosmo is a distinctive boys' name in England & Wales, ranking #747 in 2024 with 46 recorded births. The name reached its all-time peak in 2023 with 54 births ranking #651. Since 1996, the popularity has increased by 820.0%. In 2024, approximately 1 in every 6,039 boys born was named Cosmo. RISING Recent data shows the name is currently rising.