Carsen sits next to 3 phonetic neighbors — Carson, Karsen, and Larson are the closest matches by sound. Most share Carsen's Scottish cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"son of marsh dwellers"
"resolute fame, desired renown"
"slender, narrow"
"new house, bright place"
"Yahweh has given"
"fortunate, blessed"
"modern American name, strong and leading"
"elf counsel, wise counselor"
"page boy, herald"
"boundary gate"
"oak meadow, clearing in the oaks"
"joined, attached"
"from Rome (Rum/Anatolia)"
"horn, strong-willed"
"great river (geographic)"
"overseer, tenant farmer"
"modern invented name"
"God is gracious"
"land of the Indians"
"anointed one"
"roe deer forest, deer wood"
Similar sound: These names share phonetic patterns with Carsen — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Scottish/Old Norse origins, giving them the same cultural heritage as Carsen.
Rhythm: Carsen is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.