Soon sits next to 3 phonetic neighbors — Sun, Soun, and Moon are the closest matches by sound. Most share Soon's Korean-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"pure, gentle, mild"
"dark, rich"
"anointed one (short form of Christina)"
"from the flat clearing"
"vision of God"
"gift from God"
"Power fortress (short form of Valborg)"
"other, foreign"
"God is my light"
"ewe; gentle one"
"divine, goddess"
"bright fame"
"fair shoulder"
"pure"
"moon, luminescent"
Similar sound: These names share phonetic patterns with Soon — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Korean origins, giving them the same cultural heritage as Soon.
Rhythm: Soon is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.