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"
"Frenchman, man from France"
"stone worker (via Mason)"
"who is like God?"
"Jehovah is God"
"yellow-haired, blonde"
"to love"
"will, desire, helmet"
"powerful ruler"
"one who builds"
"pierces the valley"
"gift"
"genuine, bold"
"maiden, heart"
"young warrior, free man"
"modern American coinage, bright day"
"of noble renown"
"man of power on the hill"
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.