Regan sits next to 4 phonetic neighbors — Reagan, Keegan, and Brogan are the closest matches by sound. Most share Regan's Irish-rooted cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"little king, of royal descent"
"companion of God"
"dark one"
"consecrated, worthy of reverence"
"clean, righteous"
"associated with Al-Khidr, the immortal guide"
"slender"
"sea warrior, sea spear"
"young deer"
"safe haven, shelter, refuge"
"crafty, wily"
"divine water (Zoroastrian)"
"sky, heaven"
"rocky hill, ancient Armenian region"
"varies by given names the initials represent"
"little king"
"hunter"
"messenger of God"
"new house, bright place"
"that which is yet to come"
"child born at a prosperous time"
Similar sound: These names share phonetic patterns with Regan — 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 Regan.
Rhythm: Regan is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.