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"
"divine justice"
"shining hostage"
"brave as a bear, strong bear"
"beloved"
"earthly, of the earth"
"famous warrior"
"born at dawn, of the light"
"free man, Frenchman"
"man from the north, Northman"
"anointed one"
"famous throughout the land"
"free man"
"blessed"
"flame, fiery one"
"firm, steadfast (metaphorical)"
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.