Nicolai sits next to 3 phonetic neighbors — Nikolai, Nicholas, and Nicola are the closest matches by sound. Most share Nicolai's Russian-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"champion of the people"
"peaceful ruler"
"bright army, famous warrior"
"wolf-like, fierce hunter"
"God is gracious"
"lover of the earth"
"estate ruler, powerful home"
"relating to Easter, Passover"
"strong man, warrior"
"male, virile"
"joy, laughter of God"
"friend of warriors"
"will-helmet"
"proclaimer of peace"
"iron"
"people's champion"
Similar sound: These names share phonetic patterns with Nicolai — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Nicolai.
Rhythm: Nicolai is a 4-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.