Jett sits next to 4 phonetic neighbors — Jet, Brett, and Bette are the closest matches by sound. Most share Jett's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"jet black gemstone"
"favorable, agreeable"
"praised, celebrated"
"Scandinavian form of Christine, anointed"
"well-born, of noble birth"
"lake (from Welsh -lyn)"
"bright meadow"
"bright, shining one"
"wild cow"
"clear, bright, luminous"
"modern American coinage"
"God is my light"
"born in May, spring-like"
"sky, heaven (French ciel + -elle suffix)"
"God is my strength"
"sweet confection"
"peaceful ruler"
"of the sun, solar"
"elegance, goodwill"
"rich, powerful"
"dhyana — meditative absorption"
Similar sound: These names share phonetic patterns with Jett — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have English/French origins, giving them the same cultural heritage as Jett.
Rhythm: Jett is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.