Willow sits next to 3 phonetic neighbors — Willa, Billy, and Milo are the closest matches by sound. Most share Willow's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"willow tree, graceful and flexible"
"gift of Isis"
"free man"
"my God is light"
"one who wrestles, struggles"
"foreigner, of the Welsh"
"from the rippling water"
"modern coinage from la- prefix and -trell"
"god of justice"
"to set, to place, to establish"
"hound, warrior"
"rye clearing, wood clearer"
"rejoice, be glad (via Gaius/Caio)"
"God is gracious"
"abbot, religious father"
"God has given"
"famous land, fame of the land"
"imperial authority"
"descendant of the dark-eyed one"
"large homestead, big village"
Similar sound: These names share phonetic patterns with Willow — 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 Willow.
Rhythm: Willow is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.