Cassius is a distinctive boys' name in United States, ranking #576 in 2023 with 508 recorded births. The name reached its all-time peak in 2021 with 607 births ranking #485. Since 1996, the popularity has increased by 1,109.5%. In 2023, approximately 1 in every 3,363 boys born was named Cassius. STABLE Recent data shows the name is currently stable.