Yuki sits next to 5 phonetic neighbors — Yuki, Yuki, and Ruki are the closest matches by sound. Most share Yuki's Japanese cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"courage, bravery (勇気)"
"shadow, shade"
"Finnish feminine name, possibly related to air or era"
"companion, neighbor"
"precious, noble child"
"happy, joyful, content"
"crimson beauty (alternate kanji)"
"peace, safety"
"true bow (archery)"
"sunflower direction (poetic)"
Similar sound: These names share phonetic patterns with Yuki — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Japanese origins, giving them the same cultural heritage as Yuki.
Rhythm: Yuki is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.