Zoroaster, Zarathusthra

Zoroaster, Zarathusthra, or Zerdusht, the founder or reformer of the Parsee religion, of whom, though certainly a historical personage, nothing whatever is for certain known except that his family name was Spitama, that he was born in Bactria, and that he could not have flourished later than 800 B.C.; he appears to have been a pure monotheist, and not to be responsible for the Manichean doctrine of dualism associated with his name, as Zoroastrianism, or the institution of fire-worship.

Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)

Zones * Zosimus
Zoar
Zöckler, Otto
Zodiac
Zodiacal Light
Zohar
Zoilus
Zola, Émile
Zolaism
Zollverein
Zones
Zoroaster, Zarathusthra
Zosimus
Zouaves
Zoutspansberg
Zschokke, Johann Heinrich
Zug
Zuider Zee
Zuleika
Zululand
Zulus
Zumpt, Karl