Boy sits next to 4 phonetic neighbors — Bowie, Bou, and Beau are the closest matches by sound. Most share Boy's Filipino-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"young male, beloved son"
"ever-powerful king"
"of the Adriatic, the dark sea"
"from Arcadia, of the idyllic land"
"enthusiastic speech, advice"
"chalice, cup"
"rain"
"young wolf, wolf cub"
"the precious metal silver"
"great chief, mighty lord"
"possibly derived from Jason (healer) via phonetic alteration"
"strong, powerful"
"beloved, dear"
"possibly related to Old Norse Olaf (ancestor's relic)"
"lord of the rocks; from Tyre (ancient Phoenician city)"
"city of Athena; city of wisdom"
"from the Frankish haigro (heron)"
"one near the woodland clearing"
"warrior's settlement, warrior's town"
"son of Cole; charcoal-dark"
Similar sound: These names share phonetic patterns with Boy — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Filipino origins, giving them the same cultural heritage as Boy.
Rhythm: Boy is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.