Jet sits next to 4 phonetic neighbors — Jett, Brett, and Net are the closest matches by sound. Most share Jet's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"black gemstone (fossilized wood)"
"emperor, supreme ruler"
"sacred song, hymn"
"little king"
"from the Roman family Terentius"
"red river settlement"
"diminutive of Isaiah (Yeshaya)"
"reminiscent of paladin (heroic knight)"
"bold place, wild settlement"
"Jehovah is God"
"victory of the people"
"dweller by the cliff ford"
"divine protection"
"army guard, protecting warrior"
"shelter, protection"
"ruler of the people"
"God is salvation"
"deep gorge, ravine"
"from Hugh's town"
"handsome, radiant one"
Similar sound: These names share phonetic patterns with Jet — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old French/Greek origins, giving them the same cultural heritage as Jet.
Rhythm: Jet is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.