User blog comment:AlurWolf/How Do I Come Up with Shinigami Names?/@comment-18812574-20180907030158

I usually pick a combination of the name's meaning and the name's sound. To me both sound and meaning are important when naming characters. For Shinigami, I would reccommend looking at male/female Japanese given names. There are extensive lists on Wikipedia.

Also this article might help you: http://www.springhole.net/writing/is-this-a-good-name-for-my-character.htm