Rune sits next to 3 phonetic neighbors — Rue, June, and Moon are the closest matches by sound. Most share Rune's Scandinavian cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"secret, mystery"
"at a crossing, toll collector"
"beloved, drop of the sea (Mary) + house of God (Beth)"
"soft, smooth"
"Baal is the prince (Phoenician interpretation)"
"light and honor (from Nora and Eleanor roots)"
"noble, nobility"
"symbol of peace and wisdom"
"son of Maud, mighty in battle"
"boundary stone"
"torch, bright, shining"
"poetic name for Jerusalem"
"gazelle (Aramaic equivalent — this is the translation of Tabitha)"
"cool breeze"
"rejoice"
"noble, gracious"
"born of night, night beauty"
"gift from God (folk etymology)"
"from the west field"
"helmeted chief, armored head"
"rose, beautiful rose"
Similar sound: These names share phonetic patterns with Rune — 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 Rune.
Rhythm: Rune is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.