Ragnar sits next to 4 phonetic neighbors — Ragnor, Gunnar, and Baldur are the closest matches by sound. Most share Ragnar's Scandinavian cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"judgment army"
"gift of Yahweh"
"people's champion"
"yew tree army"
"victory"
"may He add another son"
"God is salvation"
"The sky, heavens"
"friend of warriors"
"the winter season, wet season"
"male, virile"
"forest friend, house friend"
"enclosed pasture, fortified place"
"gift of God"
Similar sound: These names share phonetic patterns with Ragnar — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old Norse origins, giving them the same cultural heritage as Ragnar.
Rhythm: Ragnar is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.