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"
"brave, vigorous power"
"from Kelso (place name)"
"from Capri, the island of wild goats"
"son of Anders; son of the manly one"
"son of one with a bright mind"
"established by Yahweh"
"dark settlement"
"God is gracious"
"variant spelling of Caden/Kaden"
"iron blazing, battle warrior"
"God has helped, helped by God"
"from Devon, poet"
"supplanter, he who follows at the heel (as Jacob)"
"queen, counsel"
"gift of God"
"ray of light and land"
"eternal ruler"
"slender, narrow one"
"anointed one"
"of Mars, warrior spirit (Mars element)"
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.