Adler sits next to 5 phonetic neighbors — Adler, Hadley, and Adele are the closest matches by sound. Most share Adler's German-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"eagle"
"white wave, fair phantom"
"pure meadow"
"Christmas Day, birthday of Christ"
"fame, renown"
"creative blend name"
"victory meadow"
"gift of God"
"black, dark hardwood"
"the moon (by association with Artemis)"
"transformation, science of matter"
"dearly beloved one"
"beautiful, gracious"
"lake, waterfall"
"moon, heaven"
"gust of wind (wind god)"
"triumph of the nation"
"gracious gift of God"
"little blessed one"
"heavenly Mary, beloved sky"
"light brown, beige"
Similar sound: These names share phonetic patterns with Adler — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old High German origins, giving them the same cultural heritage as Adler.
Rhythm: Adler is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.