Marc sits next to 3 phonetic neighbors — Mark, Marco, and Marcus are the closest matches by sound. Most share Marc's French-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"dedicated to Mars"
"brook, running water"
"coal farm"
"my God is help"
"YHWH has been gracious"
"Gomeric's mountain, power mountain"
"little church"
"industrious, hardworking"
"stone worker (via Mason)"
"associated with luxury and elegance"
"flame, fiery one"
"wolf counsel"
"from the Roman family Terentius"
"noble elder"
"holy name, sacred name"
"who is like God?"
"stellar explosion, burst of light"
"from the Rodney estate"
"ewe herder"
"from the west farm"
Similar sound: These names share phonetic patterns with Marc — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin origins, giving them the same cultural heritage as Marc.
Rhythm: Marc is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.