Willy sits next to 4 phonetic neighbors — Billy, Willie, and Will are the closest matches by sound. Most share Willy's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"resolute protector, determined guardian"
"little dark one"
"modern phonetic respelling of Caden/Caiden"
"strong, powerful (Roman association)"
"moonlight, lunar"
"from the riverbank settlement"
"great peace"
"from Athens"
"edge, border of land"
"may God protect, supplanter"
"the fast one, arrow"
"a group of birds, especially quail"
"follower of Dionysus (god of wine)"
"God is my judge"
"battle, fighter, combatant"
"one who bakes (occupational surname)"
"son of the grey-haired one"
"black, dark; time"
"son of the fair hero"
"he gave"
"battle settlement"
Similar sound: These names share phonetic patterns with Willy — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Germanic origins, giving them the same cultural heritage as Willy.
Rhythm: Willy is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.