Marek sits next to 3 phonetic neighbors — Marco, Mark, and Marius are the closest matches by sound. Most share Marek's Polish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"of Mars, dedicated to Mars"
"protector of people"
"may He add another son"
"priceless, of inestimable worth"
"horse-loving"
"shrine maiden (ceremonial)"
"universal ruler"
"God smiles"
"gift bearer"
"destroyer of peace (literal)"
"who is like God"
"God has given"
Similar sound: These names share phonetic patterns with Marek — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin origins, giving them the same cultural heritage as Marek.
Rhythm: Marek is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.