Nikola sits next to 3 phonetic neighbors — Nicholas, Nicola, and Nikolai are the closest matches by sound. Most share Nikola's Scandinavian cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"victory of the people"
"ruler of the home"
"protector of mankind"
"God is gracious"
"yew warrior, bow warrior"
"treasurer, keeper of treasure"
"fire"
"flower"
"middle of the plain (city name)"
"who is like God? (rhetorical — implying no one)"
"ruler of peace"
"free man, strong man"
"alder tree"
"victors garland"
"sky, heavens"
"home ruler, lord of the house"
Similar sound: These names share phonetic patterns with Nikola — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Nikola.
Rhythm: Nikola is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.