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"
"brother (informal)"
"variant of Kylo; possibly from Greek kylos"
"little wolf"
"hill, eminence (via Brian)"
"from Galilee"
"literary name: the ranger Aragorn"
"phonetic American invention"
"lotus sound"
"kermes-dyed, rich red"
"from the spring or well"
"joy, song of joy"
"servant of the temple, noble acolyte"
"the Promised Land, holy city"
"champion, cloud"
"bright fame"
"work-power, industry"
"grey valley or settlement"
"bright, bold (from 'Kash' element)"
"foot soldier"
"battle, round barrel"
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.