Boyd sits next to 4 phonetic neighbors — Lloyd, Floyd, and Doyle are the closest matches by sound. Most share Boyd's Scottish cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"blond, yellow-haired"
"prince, commander"
"beauty, adornment, grace"
"servant of Marduk"
"atmospheric mist, haze"
"counselor, advisor"
"modern invented name with noble, airy connotations"
"cold, enduring"
"modern invented combination"
"high, exalted"
"variant of Garrett/Gerald"
"dark one"
"God is my strength"
"firebrand, burning torch"
"uniquely strong, one force"
"to flow, the descending river"
"leopard, swift and agile"
"supported by Yahweh"
"chief, brave man"
"great one, gift"
"belonging to God"
Similar sound: These names share phonetic patterns with Boyd — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Scottish Gaelic buidhe origins, giving them the same cultural heritage as Boyd.
Rhythm: Boyd is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.