Alethea is a distinctive girls' name in United States, ranking #2649 in 2024 with 65 recorded births. The name reached its all-time peak in 2021 with 81 births ranking #2267. Since 1996, the popularity has increased by 209.5%. In 2024, approximately 1 in every 24,818 girls born was named Alethea. FALLING Recent data shows the name is currently falling.