Gilberto sits next to 3 phonetic neighbors — Alberto, Roberto, and Rigoberto are the closest matches by sound. Most share Gilberto's Italian-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"bright pledge"
"new house"
"from Mauritania"
"YHWH has shown favor"
"God is gracious"
"Christ-carrier"
"new house (place name)"
"born of Ra, son of Ra"
"flower"
"supplanter, he who follows at the heel"
"glory of the fatherland"
"from France"
"divine power, God's power"
"of the Vergilii clan, flourishing"
"difficult journey"
"famous wolf"
"God is salvation, the Lord saves"
"gift of God"
"noble wolf"
"shortened form of Aristotle: best purpose"
Similar sound: These names share phonetic patterns with Gilberto — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Germanic origins, giving them the same cultural heritage as Gilberto.
Rhythm: Gilberto is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.