Aiko is a Japanese name usually written with the characters for ai, love, and ko, child, so it means "child of love" or "beloved child"; Princess Aiko, the daughter of Emperor Naruhito, is its most prominent bearer. The name has been used in Japanese-American families for generations and has lately found a wider audience. Aiko moved from number 5,469 in 2015 to number 2,353 in 2023, its best rank, and stands at number 2,720 in 2025 with 63 births.