Williams sits next to 3 phonetic neighbors — Wilson, Willis, and Williamson are the closest matches by sound. Most share Williams's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"resolute protector"
"descendant of Bradan (salmon)"
"willow farm, ledge estate"
"liberation, journey"
"little fiery one"
"noble, warrior, of high birth"
"God supports"
"song, joy"
"heart"
"son of Jack"
"short form of Trevor meaning large homestead"
"nautical term for reducing sail area"
"vigilant in war, son of Cathasach"
"son of Hudde (son of Hugh)"
"champion, famous one"
"the legendary smith (from Weland/Völundr)"
"worthy, powerful"
"God has remembered"
"son of William"
"possible Japanese aesthetic: figure, image"
"diminutive of Judith, praised woman"
Similar sound: These names share phonetic patterns with Williams — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Germanic origins, giving them the same cultural heritage as Williams.
Rhythm: Williams is a 3-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.