The name Adah is a girl's name of Hebrew origin meaning "ornament". Adah and is often added to lists like Bible Names for Girls and discussed in our forums with posts like "What would you name a sibling to...?".
From the experts:
Pronounced AH-dah, this unusual biblical name -- the first female name in Genesis after Eve, and given to a number of women in the Old Testament -- is a softer Ada equivalent.
There are two Adahs in the bible, including one who was the mother of Jabal and Jubal, the other a wife of Esau.