Nixie sits next to 4 phonetic neighbors — Pixie, Trixie, and Dixie are the closest matches by sound. Most share Nixie's Germanic cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"water sprite, fairy of rivers and lakes"
"she who judges"
"rich, wealthy, prosperous"
"thanks, gratitude"
"victory meadow"
"modern invented name combining dale and lynn"
"melted, dissolved (as in love)"
"grace meadow"
"divine warrior"
"occupational surname meaning one who sews"
"the Orient, eastern lands"
"pure"
"candle, vigil light"
"wished-for child, grace"
"free one, from France"
"whole, universal"
"the Stetson hat; Western American icon"
"boundary stone"
"Anns meadow, grace meadow"
"goddess of love and fertility"
Similar sound: These names share phonetic patterns with Nixie — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Germanic origins, giving them the same cultural heritage as Nixie.
Rhythm: Nixie is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.