Alethea is a distinctive girls' name in United States, ranking #2414 in 2023 with 74 recorded births. The name reached its all-time peak in 2021 with 81 births ranking #2267. Since 1996, the popularity has increased by 252.4%. In 2023, approximately 1 in every 21,657 girls born was named Alethea. FALLING Recent data shows the name is currently falling.