Marty sits next to 4 phonetic neighbors — Marty, Barty, and Hardy are the closest matches by sound. Most share Marty's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"of Mars, warlike"
"rock (from city of Tyre)"
"wave"
"beloved of God, beloved of Yahweh"
"fair, fair-haired, white"
"divinely chosen"
"follower of Christ, anointed one"
"wise power"
"star"
"hollow, cauldron"
"modern invented compound name"
"son of the grey-haired one"
"cheerful, jovial"
"enduring, steadfast (via Dante)"
"nautical term for reducing sail area"
"wolf-desire, wolf's help"
"brave, strong boar"
"church, one who lives by a church"
"man of the forest"
"grey, rocky land"
Similar sound: These names share phonetic patterns with Marty — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin Martinus origins, giving them the same cultural heritage as Marty.
Rhythm: Marty is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.