Arno sits next to 4 phonetic neighbors — Arnold, Arne, and Aaron are the closest matches by sound. Most share Arno's German-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"eagle power"
"beloved"
"ruler of the people"
"old power, noble ruler"
"bear strength"
"to feel regret"
"eagle wolf"
"beloved one"
"copper island native"
"new house, bright abode"
"belonging to God"
"heavenly, exalted"
"famous home, famous in homeland"
"wild, untamed (from silva)"
"to be worthy"
"home ruler, power of the home"
"famous warrior"
"dear friend, beloved companion"
"healer"
"noble and ready"
Similar sound: These names share phonetic patterns with Arno — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Germanic origins, giving them the same cultural heritage as Arno.
Rhythm: Arno is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.