Mariano sits next to 4 phonetic neighbors — Mario, Marino, and Marciano are the closest matches by sound. Most share Mariano's Italian-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"of the gens Maria, manly"
"manly, brave"
"new house"
"God is gracious"
"well-born, noble"
"God is my judge"
"glory of the fatherland"
"may God protect (folk etymology from Santiago)"
"strength of God"
"lover of God"
"sprout, bud"
"my God has helped"
"crimson, deep red"
"reborn, born again"
"God enlightens"
"Yahweh has shown favor"
"supreme judge, great counselor"
Similar sound: These names share phonetic patterns with Mariano — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin origins, giving them the same cultural heritage as Mariano.
Rhythm: Mariano is a 4-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.