Curious about naming conventions used

The recent thread had me wondering ...

So Goliath's clan (with the exception of Goliath himself) are now
named after places in NY

Demona was named by Macbeth for her demon-like fighting.

The Gargs on Avalon were all named after angels of the Western root
religion (Judeo-Christian-Islamic)

The ones of (was it Brazil ?) were variations on specific stones
(Obsidian, Jade, Turquoise, etc).

The London clan were named after their represented animal

I am not familiar enough with Japanese mythology to recognize what
those were named after, however.  Can anyone shed some light?  Are
they Japanese mythological names?

In a related question, if the names do have significance to specific
personalities in Japanese myth/legend, are the characters protrayed
similar in personality to the name-sake? or different? (i..e. is the
one that is a traitor by selling out his clan in the show  named after
someone else that was also a traitor)

Just random curiosity ...

Thanks in advance.