Gianluca sits next to 3 phonetic neighbors — Gianni, Luca, and Giovanni are the closest matches by sound. Most share Gianluca's Italian-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"God is gracious"
"from France"
"bearer of Christ"
"divine power, God's power"
"brave as a bear, strong bear"
"anointed one"
"glory of the fatherland"
"born at dawn, bringer of light"
"lover of God"
"man from the north, Northman"
"God is gracious"
"aristocratic, of high birth"
"flame, fiery one"
"earthly, of the earth"
"bold bear"
"free one"
"firm, steadfast (metaphorical)"
"my God is Yahweh"
"of the gens Maria, manly"
Similar sound: These names share phonetic patterns with Gianluca — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew via Italian origins, giving them the same cultural heritage as Gianluca.
Rhythm: Gianluca is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.