Nicholai sits next to 4 phonetic neighbors — Nicholas, Nikolai, and Nikolas are the closest matches by sound. Most share Nicholai's Russian-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"victory of the people"
"protector of people"
"holds firm the good"
"shield-wolf"
"elevated terrain, mountain land"
"firebrand, bold warrior"
"devoted to Demeter, of the earth goddess"
"true, faithful, trustworthy"
"royal court attendant"
"of Mars, little warrior"
"gift of God, gift of Yahweh"
"little deer"
"strong, healthy"
"lord of the manor, estate ruler"
"God will establish, God raises up"
"day"
"son of Mads (Matthew)"
Similar sound: These names share phonetic patterns with Nicholai — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Nicholai.
Rhythm: Nicholai is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.