Diyan sits next to 4 phonetic neighbors — Dylan, Dayan, and Dian are the closest matches by sound. Most share Diyan's Slavic cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"light, brightness"
"free-flowing, vital energy"
"one who cannot be held back"
"courage, bravery"
"joy, divine blessing"
"dawn, beginning of a new day"
"nickname form of Titus (defender)"
"rays of the sun; life-giving"
"king, ruler"
"light, illumination"
"end of the Vedas (the Upanishads)"
"one who pervades the universe"
"share of the brave"
"dawn, golden morning"
"archive, keeper of records"
"supreme portion"
"brave man of power"
"new, sky (nav element)"
Similar sound: These names share phonetic patterns with Diyan — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Slavic origins, giving them the same cultural heritage as Diyan.
Rhythm: Diyan is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.