Luca sits next to 4 phonetic neighbors — Luke, Lucas, and Luka are the closest matches by sound. Most share Luca's Italian-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"man from Lucania"
"who is like God?"
"fair, white, bright"
"Saint James, pilgrimage patron"
"Yahweh has shown favor"
"merciful, gentle"
"one who carries Christ in heart"
"son of Madoc"
"one who walks"
"horseman, knight"
"light, illumination"
"God is gracious"
"wild man; Irish person"
"asked for, prayed for"
"From the Irish 'Aodhan', a diminutive of Aodh, the Celtic god of fi..."
"gift of Yahweh"
"sea, ocean"
"full of goodness"
"deer lover, champion warrior"
"defender of men"
"bald, hairless"
Similar sound: These names share phonetic patterns with Luca — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin origins, giving them the same cultural heritage as Luca.
Rhythm: Luca is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.