Matt sits next to 4 phonetic neighbors — Mat, Nat, and Pat are the closest matches by sound. Most share Matt's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"gift of God, gift of Yahweh"
"gift of God"
"mind, heart, spirit"
"from Brittany (Celtic region)"
"son of Rhys, ardor and enthusiasm"
"God is gracious (via Hans/John)"
"the shining one"
"huntsman, game warden"
"God is good"
"increase, wisteria"
"noble born"
"heavy club weapon"
"proud descendant, son of the proud one"
"of the (invented compound)"
"rider, horseman, mounted warrior"
"he laughs, he will laugh"
"smooth, tender"
"place of the male deer"
"Olympic victor"
"grandfather"
"variant of Nile (great river)"
Similar sound: These names share phonetic patterns with Matt — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Hebrew origins, giving them the same cultural heritage as Matt.
Rhythm: Matt is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.