Adaia is a spelling of the Hebrew name Adaiah, which means "adorned by the Lord" or "the Lord has adorned"; it belongs to several minor figures in the Old Testament, including the grandfather of King Josiah. Its flowing vowels link it to Amaia, Alaia and Adalia, which explains its appeal beyond religious families. In the United States Adaia was rare until recently: it ranked number 6981 in 2015, jumped to number 1992 in 2022 and stood at number 2607 in 2025 with 66 girls.