Romulus sits next to 5 phonetic neighbors — Remus, Romulo, and Romolo are the closest matches by sound. Most share Romulus's Latin-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"of Rome, strength"
"of the gods"
"brave in battle (via Casey etymology)"
"great, kingly"
"God is gracious"
"from the forest"
"powerful, rich one"
"doctor, healer"
"realm of the dead"
"the Lord is salvation"
"one who cuts, cutter of cloth or stone"
"God is my light"
"combination of Kai (sea/earth) and -ler suffix (one who)"
"measuring instrument, standard dimension"
"king's settlement"
"sound, reverberation"
"modern invented name combining Zay and lyn"
"one who raids, bold adventurer"
"modern coinage"
"free man"
"place of protection and calm"
Similar sound: These names share phonetic patterns with Romulus — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin origins, giving them the same cultural heritage as Romulus.
Rhythm: Romulus is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.