Dian sits next to 5 phonetic neighbors — Dean, Diante, and Dion are the closest matches by sound. Most share Dian's Chinese cluster, so the rhythm and vowel shape carry across the list.
You searched for names like
"candle, light"
"red (from Spanish rojas)"
"love, passion"
"one who does not speak, baby"
"happy, fortunate"
"gift of God"
"abundance, well-being"
"maple tree"
"Germanic family name of uncertain origin"
"messenger of God"
"relating to time or the hours"
Similar sound: These names share phonetic patterns with Dian — similar vowel sounds, consonant clusters, or rhythm.
Shared roots: Several names on this list have Malay/Indonesian origins, giving them the same cultural heritage as Dian.
Rhythm: Dian is a 2-syllable name. Names with the same syllable count tend to feel interchangeable when you're narrowing your list.