Adler sits next to 4 phonetic neighbors — Asher, Archer, and Alder 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"
"may God protect, holder of the heel"
"bright fame"
"descendant of Braonán, tearful one"
"watchful"
"city of God (alternate interpretation)"
"genuine, authentic, honest"
"spotted one"
"born of fire"
"at the cattle sheds, one from the byres"
"noble lord"
"church official, rule of law"
"reed island, island near the clearing"
"fine, elegant"
"flame, fiery one"
"manly, brave, strong"
"God shall add (another son)"
"he who holds firm the good"
"enlightenment, calm clarity"
"queen's settlement"
"bold, mighty"
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.