Nyx sits next to 3 phonetic neighbors — Nix, Lynx, and Phoenix are the closest matches by sound. Most share Nyx's Greek-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"night"
"narrow channel (from Kyle)"
"handsome, well-born"
"gift of God (by association with Zay names)"
"deliverance, rescue"
"hawk"
"God is salvation, God saves"
"gift of God"
"one who tills the land, farmer"
"divine gift, God-given"
"clean, righteous"
"large settlement, big homestead"
"builder, craftsman"
"a group of birds, especially quail"
"modern American coinage"
"modern coined name"
"a million (great abundance, infinite blessing)"
"small stream, narrow inlet"
"beautiful, handsome"
"man, manly"
Similar sound: These names share phonetic patterns with Nyx — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Greek origins, giving them the same cultural heritage as Nyx.
Rhythm: Nyx is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.