🔼The name Addon in the Bible
The names אדן (Addan) and אדון (Addon) are really the same name, just pronounced slightly different. These names denote a city in Babylon from whence came groups of exiles who could not prove that they, or their families, truly came from Israel. Both Ezra (2:59) and Nehemiah (7:61) report that the genealogical records were scrutinized to find their heritage but this proved to no avail. Thus they were considered unclean and were excluded from the priesthood.
🔼Etymology of the name Addon
The names Addan and Addon come from the stock that also produced the name Adonai:
The actual etymology and meaning of this group of names is disputed, but see our lengthy article on Adonai for a discussion.
For a meaning of the names Addan and Addon, NOBSE Study Bible Name List ignores the connection to the identical Hebrew word treated above, and goes with a Assyrian root and reads Strong. Alfred Jones (Dictionary of Old Testament Proper Names), who mistakes Addan and Addon for a person, leans towards an Arabic verb and reads Calamity.