Mergen sits next to 3 phonetic neighbors — Morgan, Merwin, and Bergen are the closest matches by sound. Most share Mergen's Mongolian-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"wise, skilled marksman"
"fat tail, referring to a grouping of stars"
"Modern invented name with powerful, dynamic connotations"
"diamonds, brilliance (hip-hop slang)"
"one who lives near a spring or who springs"
"Combined or doubled tree"
"of the highest class or quality"
"the fourth born"
"Bright and splendid"
"from the hall or manor house"
"victory of the people"
"of Jove (Jupiter), cheerful and good-humored"
"valley of pigs"
"noble one (from Germanic adal)"
"brilliantly renowned"
Similar sound: These names share phonetic patterns with Mergen — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Mongolian origins, giving them the same cultural heritage as Mergen.
Rhythm: Mergen is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.