Vana'diel Bestiary: Za'Dha Adamantking  

As the Quadav King, Za’Dha controls the entire Quadav army and is the strongest warrior among them. It is thought his reign has lasted over 100 years, but the custom of transferring the Adamantking title to future generations makes this measurement inaccurate and perhaps trivial.

Some/all of the information in this article has been culled from various FFXI guides, and translated by Elmer the Pointy.