So I was examining the names of Kubera in an attempt to answer the question, "Who is the supreme deity, Yakṣa form." Then, I realized literally all of Kubera's names have dark associations or subtext and would fit a stereotypical villain than a stereotypical deity. What's up with that? Are the Yakṣa just naturally dark and/or evil-like (not necessarily truly evil)?
See for yourself here:
http://sanskritdictionary.com/?iencoding=iast&q=kinnare%C5%9Ba&lang=sans&action=Search
I am especially talking about the ones in the Amarakosha Search i.e.
Ekapiṅga, Paulastya, Dhanādhipa, Manuṣyadharman, Tryambakasakha, Śrīda, Yakṣa, Vaiśravaṇa, Rājarāja, Guhyakeśvara, Aiḍaviḍa, Naravāhana, Kinnareśa, Dhanada, Yakṣarāṭ, Puṇyajaneśvara.