Azi Dahaka,Angra Mainyu are bosses in FFX-2 and in Zoroastrian religion,are important characters.Angra Mainyu is the god of darkness and evil,while Azi Dahaka is a dragon.
In FFX-2,Aka Manah,Aeshma,Daeva,Jahi,Tawrich and Zarich,are all named after Persian demons.Taromaiti,also from X-2,is named after Angra mainyu's daughter.Zurvan(which is ALSO from X-2)is named after the father of Angra Mainyu and Ahura Mazda,the chief Zoroastrian god of light and good.
Ahriman,a common FF enemy,is another name for Angra Mainyu.
Thamasa,a town in FFVI,means "to one in the mode of darkness" in Sanskrit.
You guys remember that in FF??(4 I think),that Ultima weapon was misnamed "Atma" Weapon?Well in Sanskrit,Atman means soul.Coincedence?
Yeah,you better love me after doing this research for you.
Btw,
www.ffcompendium.com is where I got my info.