Gaumata is generally regarded as an impostor who ruled over Persia and inclusive Babylon for less than a year before being ousted by Darius the Great. "Kraft proposes that Gautama and Gaumata share more than just the suspicious similarity of their names; that they are, in fact, the same person.
Humbach (Mainz U.) and Faiss explore the names of deities and people in Greek historian Herodotus' (484-425 BC) account of the Iranian people of the northern Black Sea region and living on the border of Darius the Great's empire.
The Caspian horse, or the 'Kings' Horse' - the oldest breed of horse in the world still in existence- was used in ancient Iran as a chariot horse for racing and in battle, and presented to kings and queens as a valuable gift and is known to be favored by Darius the Great.