Marcus sits next to 3 phonetic neighbors — Mark, Marco, and Markus are the closest matches by sound. Most share Marcus's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"of Mars, warlike"
"crooked nose"
"little king"
"the Lord is my God"
"shelter, dwelling"
"battle"
"one who lives near a lane"
"my God is the Lord, from Elijah"
"ruler of the home"
"famous warrior, renowned in battle"
"favored by the gods"
"gift of the Lord"
"son of Carsun, dweller near the marsh"
"from Reims"
"one who finishes cloth"
"patrician, of noble birth"
"son of Jack"
"venerable"
"speckled, freckled"
"God has healed"
"hunter"
Similar sound: These names share phonetic patterns with Marcus — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin origins, giving them the same cultural heritage as Marcus.
Rhythm: Marcus is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.