Wilbur sits next to 4 phonetic neighbors — Gilbert, Wilber, and Walter are the closest matches by sound. Most share Wilbur's English-origin cluster, so the rhythm and vowel shape carry across the list.
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"resolute fortress, determined will"
"new house"
"second of twins"
"money, currency"
"aromatic spice from nutmeg"
"modern invented name, lively"
"modern invented name"
"thunder, of Thor"
"rule, standard"
"letter Z sound"
"wrathful, to cause pain"
"hollow"
"thankful"
"meadow by the stream"
"youth, vital force"
"strength, my strength"
"blooming, flourishing"
"dweller by the mills, mill worker"
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"one who possesses, nest-maker"
Similar sound: These names share phonetic patterns with Wilbur — 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 Wilbur.
Rhythm: Wilbur is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.