Roman sits next to 4 phonetic neighbors — Romeo, Ronan, and Roan are the closest matches by sound. Most share Roman's Latin-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"citizen of Rome, Roman"
"derived from Calvus, bald"
"firm foundation"
"warrior, strong man"
"the healer (Iason)"
"noble, strong"
"God is gracious"
"soldier"
"divine gift"
"From the Scottish place name Logan; a topographic name from Gaelic ..."
"may God give increase"
"round hill"
"a church official or head"
"great wave"
"strong-willed, wise"
"son of David"
"consecrated; worthy of reverence"
"the Lord is my God"
"son of the grey-haired one"
"my messenger, my angel"
Similar sound: These names share phonetic patterns with Roman — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin origins, giving them the same cultural heritage as Roman.
Rhythm: Roman is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.