Mark sits next to 4 phonetic neighbors — Marc, Marcus, and Marco are the closest matches by sound. Most share Mark's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"of Mars, warlike"
"teacher, messenger"
"man, mankind, human"
"supplanter's son (via James → Jacob)"
"gift of God"
"great well"
"From the English surname 'son of the grieve (estate overseer)' or '..."
"noble, strong"
"tile maker, brick layer"
"Beauty, grace"
"one who carries the divine"
"salvation of God, the Lord saves"
"who is like God?"
"derived from Calvus, bald"
"dark one, black"
"Jehovah is God; the Lord is my God"
"he has heard, God has heard"
"sea, ocean"
"protector of mankind"
"from the eastern homestead"
"divine healer"
Similar sound: These names share phonetic patterns with Mark — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin origins, giving them the same cultural heritage as Mark.
Rhythm: Mark is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.