Buck sits next to 4 phonetic neighbors — Duck, Tuck, and Chuck are the closest matches by sound. Most share Buck's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"male deer, strong young man"
"may God protect"
"free ruler, powerful peace"
"my people"
"of Shawn (Da prefix intensifier)"
"defender of men"
"older, senior in wisdom"
"falling, rhythmic beat"
"descendant of the shouter (herald)"
"from the rust-colored estate"
"hero, champion, semi-divine mortal"
"son of Dick, son of Richard"
"place by a waterway lock"
"made of gold, radiant"
"priceless, beyond praise"
"defender of men"
"round hill, hillock"
"sun, shepherd"
"descendant of the hound of valor"
"laughter of God"
"graceful, elegant"
Similar sound: These names share phonetic patterns with Buck — 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 Buck.
Rhythm: Buck is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.