Xenocrates, [81-82], [105], [113], [129].

Xenophanes of Colophon, [13], [17-21],

[52], [56].

Xenophon, [58], [59], [62], [66], [67].

Memorab. [58], [60].

Apology, [58].

Zeller, [76], [79].

Zeno of Elea, [21].

Zeus, [16], [22], [30], [43], [55], [57], [58], [81], [105], [111], [124].