Nels sits next to 5 phonetic neighbors — Neil, Niels, and Nels are the closest matches by sound. Most share Nels's Scandinavian cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"champion, cloud"
"bearer of Christ, Christ-carrier"
"land near the court"
"small amphibian (secondary association)"
"God is gracious (via Sean)"
"brewer, one who brews"
"village of the Danes"
"Thor's stone"
"brave as a bear, bold bear"
"the best, most excellent"
"wise, judicious"
"eternal king, pure lineage"
"enclosed field"
"from Vinci (a town in Tuscany)"
"shield-wolf"
"eager nobleman"
"great house"
"uncertain — possibly related to the island of Ikaria"
"from Airelle (beloved place)"
"valley dweller"
Similar sound: These names share phonetic patterns with Nels — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Irish Gaelic via Scandinavian origins, giving them the same cultural heritage as Nels.
Rhythm: Nels is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.