Doyle sits next to 4 phonetic neighbors — Dale, Kyle, and Boyd are the closest matches by sound. Most share Doyle's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"dark foreigner; dark stranger"
"boar strength, hardy"
"noble estate"
"wealthy, possessing good"
"craftsman, carpenter"
"old river; slow-flowing water"
"the direction of the rising sun"
"goat (Greek mythology - Aegeon)"
"one who follows"
"an extremely large, uncountable number; boundless"
"near the barns, barn keeper"
"from the valley"
Similar sound: These names share phonetic patterns with Doyle — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Irish Gaelic origins, giving them the same cultural heritage as Doyle.
Rhythm: Doyle is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.