Rejan sits next to 4 phonetic neighbors — Rajan, Reagan, and Regan are the closest matches by sound. Most share Rejan's English-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"king, ruler"
"from the barley meadow (topographic)"
"mercy of God"
"king who speaks wisdom"
"outlaw, one who has been banned"
"a magical charm or spell; also a curse"
"Inspired by the Japanese Kaizen philosophy meaning 'continuous impr..."
"modern invented name combining elements of strength and wisdom"
"one who illuminates"
"Settlement near a rift or cleft in the land; from Old English rif (..."
"place of destruction, the abyss"
"modern invented name, possibly sun"
"Water of life; the distilled spirit drink"
Similar sound: These names share phonetic patterns with Rejan — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Sanskrit origins, giving them the same cultural heritage as Rejan.
Rhythm: Rejan is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.