Nikki sits next to 3 phonetic neighbors — Nicki, Nicci, and Nicky are the closest matches by sound. Most share Nikki's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"victory of the people"
"noble one"
"light"
"peace"
"beautiful voice"
"tailor, one who cuts cloth"
"lake, pool"
"gracious, beautiful"
"slender, fair"
"flower wreath, vine"
"rival, striving"
"land of Eire, western isle"
"son of David, beloved"
"ascent, immigration"
"creative blend name"
"little angel"
"valley of the River Kent"
"his gift"
"united, connected"
"celestial royalty"
Similar sound: These names share phonetic patterns with Nikki — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek Nikolaos origins, giving them the same cultural heritage as Nikki.
Rhythm: Nikki is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.