Che sits next to 3 phonetic neighbors — Shay, Che, and Chay are the closest matches by sound. Most share Che's Spanish-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"informal address, hey, buddy"
"little elk / noble one (Germanic interpretation)"
"the greatest, most excellent"
"staff bearer, rod bearer"
"of the woods, forest dweller"
"warrior, man of valor"
"soldier"
"wrathful, full of wrath"
"Lamb; gentle and pure"
"guardian deity"
"new house"
"king + world (folk etymology)"
"phonetic Cuban variant of Joel/Yoel"
"dolphin"
"downy-bearded, youthful"
"one who serves, preserver"
Similar sound: These names share phonetic patterns with Che — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Mapuche/Argentine Spanish origins, giving them the same cultural heritage as Che.
Rhythm: Che is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.