Argo sits next to 4 phonetic neighbors — Cargo, Margot, and Largo are the closest matches by sound. Most share Argo's Greek-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"bright; swift"
"Long meadow or clearing in the woods"
"mild, merciful"
"settlement of Barra's people"
"powerful person, dynamic one"
"Little saint; diminutive form of Santo"
"elf friend"
"bright, shining warrior"
"work + power"
"island of goats"
"gray color"
"spear bearer, warrior"
"new house, new home"
"Modern invented name; energetic and bold spirit"
"Of the forest; made of wood"
Similar sound: These names share phonetic patterns with Argo — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Argo.
Rhythm: Argo is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.