Andamo sits next to 4 phonetic neighbors — Andar, Andres, and Adamo are the closest matches by sound. Most share Andamo's Unknown-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"uncertain — possibly invented or from an undocumented oral tradition"
"creative American phonetic name"
"brother, brotherly"
"mythical guardian creature"
"rope, cord (from Old French 'corde')"
"like a big body of water"
"gift, blessing (invented, Zion root)"
"thankful"
"eagle, nobleman"
"pure one"
"of the river Jordan"
"son of Owen"
"oak grove"
"strong-willed warrior"
"noble guardian"
"little warrior"
"rhyme seller, poet"
"ruler, sovereign (Greek/Latin influence on Tyrant root)"
"abundance, growth, increase"
Similar sound: These names share phonetic patterns with Andamo — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Unknown origins, giving them the same cultural heritage as Andamo.
Rhythm: Andamo is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.