Nivan sits next to 4 phonetic neighbors — Nevin, Niven, and Evan are the closest matches by sound. Most share Nivan's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"holy, divine"
"bear (totem name)"
"pure, clean, blessed"
"rye farmer"
"made by God"
"of Mars, warlike"
"modern American invention"
"to follow a path, to mark"
"possibly little duck, Gaelic diminutive"
"gift of God (gift of Yahweh)"
"Lord, master"
"little fire, born of fire"
"fair-haired hero"
"born on Thursday (Kwan element)"
"noble guardian"
"modern invented name, no established meaning"
"son of Agnes (pure, holy)"
"noble valor, kingly"
"rejoicing in the way"
"language, voice"
Similar sound: These names share phonetic patterns with Nivan — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Irish/Gaelic origins, giving them the same cultural heritage as Nivan.
Rhythm: Nivan is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.