Lux sits next to 4 phonetic neighbors — Luca, Luke, and Lax are the closest matches by sound. Most share Lux's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"light"
"counsel, power"
"my God is Yahweh"
"divine power"
"river (from Celtic afon)"
"holy name, sacred name"
"genuine, bold"
"power of the tribe"
"of Dionysus, god of wine"
"to light up, illuminate"
"God is gracious"
"built by the Lord"
"beloved, dear one"
"pilgrim, palm branch bearer"
"son of Case; from the marsh"
"red river settlement"
"one who thatches roofs"
"cedar tree, resinous wood"
"son of the gray-haired one"
"the koa (warrior tree)"
"he who causes distress"
Similar sound: These names share phonetic patterns with Lux — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin origins, giving them the same cultural heritage as Lux.
Rhythm: Lux is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.