Charlie sits next to 4 phonetic neighbors — Charlee, Charli, and Charlotte are the closest matches by sound. Most share Charlie's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"free man"
"pleasant, sweet"
"rival, eager"
"ewe, gentle; lake"
"noble, of noble kind"
"born in summer"
"immortal (folk etymology)"
"each of the two"
"the royal/divine one (lani = heaven/royalty)"
"told by God"
"the moon"
"son of Colin, victory of the people"
"king's meadow"
"flower named for botanist Anders Dahl"
"strength"
"torch, bright flame"
"small bird (the wren)"
"son of the earth"
"sailor, one who sails"
Similar sound: These names share phonetic patterns with Charlie — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Germanic origins, giving them the same cultural heritage as Charlie.
Rhythm: Charlie is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.