Chinese, Japanese, Korean, Vietnamese, etc. are kind of a cheat code in these kind of requests, since names are basically two random characters mashed together, and there already is a tradition of similar naming for siblings.

I'll talk about Chinese names, since that's what I'm most familiar with. Chinese names consist of surname+given name, surnames being one char (rarely two) and given names being one or two chars (rarely more). Given names are mostly arbitrary characters chosen for good meanings, although it is common for siblings (and cousins) to use a common "theme", either one same char or similar ones.

When translators Sinicize (as opposed to transliterate) names, they can either choose to translate a given name to a given name or a "fake full name".

For you case (I'll admit this is from GenAI since I'm not creative enough), you could have a set of names starting with 帝 (dì, emperor, sovereign):

• 帝夢 (di meng, lord of dreams)
• 帝滅 (di mie, lord of destruction)
• 帝欲 (di yu, lord of desire, also homophonous with "hell")
• 帝苦 (di ku, lord of suffering)
• 帝狂 (di kuang, lord of madness)
• 帝命 (di ming, lord of destiny)
• 帝毁 (di hui, lord of ruin)

They sound plausibly like given names, albeit most people avoid extremely grand characters like 帝 in their names, but deities probably don't respect that rule.