Earl sits next to 3 phonetic neighbors — Earl, Erl, and Orl are the closest matches by sound. Most share Earl's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"nobleman, warrior"
"new (as prefix in Punjabi names)"
"from the hazel trees"
"Romantically associated with the poet Lord Byron meaning noble and ..."
"crooked nose (old Gaelic nickname)"
"Patrick's town, fighter's settlement"
"victory; honor"
"thankful, God has heard"
"beauty, grace"
"son of Brice; son of Bryce"
"praised by God (theophoric construction)"
"powerful army"
"passionate, ardent"
"lover of hounds"
"son of Elijah"
"from Rome, Roman pilgrim"
"Aromatic herb, salvia"
"eagle friend"
"one who lives near a steep bank"
"the carved one (alternate etymology)"
Similar sound: These names share phonetic patterns with Earl — 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 Earl.
Rhythm: Earl is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.