Markos sits next to 4 phonetic neighbors — Marcus, Marcos, and Marco are the closest matches by sound. Most share Markos's Greek-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"of Mars, warlike"
"gift of God"
"anointed one"
"sun, throne"
"the good one"
"victory of the people"
"devoted to Demeter, of the earth goddess"
"firmness, constancy"
"to heal, to cure"
"may Yahweh give increase"
"behold, a son"
"rock, stone"
"victor's crown"
"male, manly"
"not evil, innocent"
"lord of waters"
Similar sound: These names share phonetic patterns with Markos — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin origins, giving them the same cultural heritage as Markos.
Rhythm: Markos is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.