What does Adlai mean?
Adlai \a-dlai, ad-lai\ as a boys' name (also used as girls' name Adlai) is pronounced AD-lay. It is of Hebrew origin, and the meaning of Adlai is "God is just". Aramaic contracted form of the Hebrew name Adaliah. Also possibly means "ornament" in Hebrew. Biblical name borne by a very minor character, the father of one of King David's herdsmen. Made famous in the 20th century by the presidential candidate Adlai Stevenson.
Adlai is an uncommonly occurring given name for males. Adlai is also an unusual surname for both adults and children. (2000 U.S. Census)
Shown below is an analysis of the usage of Adlai and related names. The only prominent varying form of Adlai (#unlisted) is Addie. Adoption of this boy name reached its apex during 1880-1889 and is now significantly lower, with the version Addie becoming less in vogue. (Top 1000 Baby Names Records, 2014)