Addah sits next to 3 phonetic neighbors — Ada, Adah, and Adda are the closest matches by sound. Most share Addah's biblical cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"ornament, adornment, beauty"
"pearl, great one"
"from the high stronghold, fortified place"
"bright, shining one"
"Blind; sixth; associated with Saint Cecilia, patron saint of musicians"
"bold as a bear"
"sun-bright, radiant"
"twin"
"river"
"powerful ruler"
"life, wished for child"
"Possibly invented American name; associated with leadership"
"elf counsel, wise counsel"
"forest dweller"
"noble and famous"
Similar sound: These names share phonetic patterns with Addah — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew origins, giving them the same cultural heritage as Addah.
Rhythm: Addah is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.