Jarrett sits next to 5 phonetic neighbors — Garrett, Jared, and Barrett are the closest matches by sound. Most share Jarrett's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"variant of Garrett/Gerald"
"without death, eternal"
"modern invented American name"
"God is my strength"
"ancestor descendant"
"crowned one, garland-wearer"
"star"
"river in Peru"
"raven, crow"
"one who loves God"
"messenger of God"
"fiery one"
"nobleman, marquess, border guardian"
"harmony, concord"
"wealthy protector"
"firebrand, burning torch"
"prosperous ruler"
"sky"
"sea fortress"
"spiritual essence, animating force"
"from the kaupa (trading) land"
Similar sound: These names share phonetic patterns with Jarrett — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Germanic origins, giving them the same cultural heritage as Jarrett.
Rhythm: Jarrett is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.