Dejan sits next to 3 phonetic neighbors — Dayan, Dajan, and Deion are the closest matches by sound. Most share Dejan's South Slavic-origin cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"gift, given"
"cinema; motion picture"
"glory, to celebrate"
"refinement, subtlety"
"the people, citizen"
"from Leicester (Roman fort on the River Leir)"
"Descendent of Shannon; God is gracious"
"the reinforced, the backed"
"Hugh's meadow or clearing"
"exalted by God"
"dark one, man from the dark sea"
"God is with us"
"generous, noble, honorable"
"one who dreams, visionary"
"God is gracious; Yahweh is gracious"
Similar sound: These names share phonetic patterns with Dejan — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have South Slavic origins, giving them the same cultural heritage as Dejan.
Rhythm: Dejan is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.