Dean sits next to 3 phonetic neighbors — Dane, Deen, and Dion are the closest matches by sound. Most share Dean's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"church official overseeing ten"
"little seal"
"deer lover, champion warrior"
"son of Jack"
"from Lucania (ancient region of Italy)"
"of the forest"
"lake colony, settlement by the pool"
"soldier, merciful"
"from the Artorius family"
"From the Aramaic 'Toma', meaning twin; borne by the Apostle Thomas"
"From Hebrew 'Yaakov'; the biblical patriarch who wrestled with an a..."
"Gaelic speaker"
"Italian form of John, gift of God"
"tiller of the soil, agriculturalist"
"man, full-grown man"
"consecrated; worthy of reverence"
"fair-haired hero; white warrior"
"master, conqueror"
"son of the valiant one"
Similar sound: These names share phonetic patterns with Dean — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Latin decanus origins, giving them the same cultural heritage as Dean.
Rhythm: Dean is a 1-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.