Child sits next to 4 phonetic neighbors — Miles, Kyle, and Giles are the closest matches by sound. Most share Child's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"young person, noble youth"
"defender, advocate"
"bear-like strength (if related to arth)"
"hill, headland, enclosure"
"child of Zeus (folk etymology)"
"creative modern name"
"strengthened by God"
"fair outlook"
"land of oaks"
"modern invented name, lively"
"hollow, seething pool"
"thunder, of Thor"
"dark blue"
"peace + ruler"
"healer"
"determined guard, resolute protector"
"sun ray, luminous"
"creative American coinage"
"tumult, noise"
"pledge, oath"
"lord, master (via Kyrie element)"
Similar sound: These names share phonetic patterns with Child — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Old English origins, giving them the same cultural heritage as Child.
Rhythm: Child is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.