Cassiopeia is a distinctive girls' name in United States, ranking #8977 in 2025 with 11 recorded births. The name reached its all-time peak in 2022 with 18 births ranking #6502. Since 1996, the popularity has increased by 57.1%. In 2025, approximately 1 in every 146,115 girls born was named Cassiopeia. FALLING Recent data shows the name is currently falling.