Cornell sits next to 4 phonetic neighbors — Cornelius, Carnell, and Darnel are the closest matches by sound. Most share Cornell's Welsh cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"horn blower"
"legend, one who will be remembered, exceptionally famous person"
"from the clearing"
"heron bird, large wading bird"
"ruler of the estate"
"flowing"
"son of Matthew"
"great peace"
"thunder and lightning"
"city of Athena; city of wisdom"
"bright fame"
"rye land, land of rye"
"divine wonder"
"son of Jack"
"son of Aodh (fire)"
"from Navarre, the plain"
"the great beast, tiger"
"of the court, refined"
"The Lord is my God"
"brave ruler, powerful leader"
"he gave"
Similar sound: These names share phonetic patterns with Cornell — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin origins, giving them the same cultural heritage as Cornell.
Rhythm: Cornell is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.