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"
"Hugh's meadow or clearing"
"refinement, subtlety"
"bright, luminous"
"Effort; endeavor; to try"
"Descendent of Shannon; God is gracious"
"glory, to celebrate"
"God is gracious; Yahweh is gracious"
"one who dreams, visionary"
"young bear, young animal"
"tree field"
"magnanimous, the generous one"
"wise and brave"
"the reinforced, the backed"
"God is with us"
"exalted by God"
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.