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"
"powerful ruler of the household"
"renowned in battle"
"kingly, of the king"
"sky father, father of gods"
"God is gracious"
"noble, refined"
"new (as prefix in Punjabi names)"
"harmony, concord"
"son of the home ruler"
"famous spear (from Hrodgar)"
"curly-haired"
"one who catches fish"
"slender, narrow"
"of the forest, wood dweller (via Silas)"
"strength and help of God (combined from Ezra and Azariah)"
"to flow, the descending river"
"creative modern spelling variant"
"from Lucania"
"the carved one (alternate etymology)"
"prince, commander"
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.