Πτιαῦ
Ptiau

Greek noun
loaned from Egyptian

Last edited: 2025-02-12
Primary meaning Decan 1 of Aquarius
Variants
Πτιαῦ Ptiau reading of Ep. 4 (only)
Πιαύ Piau variant reading in MS P
Πτιάν Ptian variant reading in MS A
Edited by
Decan 1 of Aquarius decan

οἱ δὲ τρεῖς αὐτοῦ δεκανοί· Πτιαῦ ὁ πρῶτος, Ἀεὺ ὁ δεύτερος, Πτηβυοὺ ὁ τρίτος

‘The three decans of (Aquarius) are: Ptiau, the first; Aeu, the second, Ptēbuou, the third’

— Hephaestion 1.1.205

Genre: astrological treatise
Date: 5th century CE
Cite this entry
APA (7th)
Zellmann-Rohrer, M. (2025). Πτιαῦ (Lemma #2882). The ZODIAC Glossary: A Cross-Cultural Glossary of Ancient Astral Science. https://zodiacglossary.github.io/lemma/2882/
Chicago (Author-Date)
Zellmann-Rohrer, M. (2025). Πτιαῦ (Lemma #2882). The ZODIAC Glossary: A Cross-Cultural Glossary of Ancient Astral Science. https://zodiacglossary.github.io/lemma/2882/
MLA (9th)
Zellmann-Rohrer, M. (2025). Πτιαῦ (Lemma #2882). The ZODIAC Glossary: A Cross-Cultural Glossary of Ancient Astral Science. https://zodiacglossary.github.io/lemma/2882/
Harvard
Zellmann-Rohrer, M. (2025) Πτιαῦ (Lemma #2882), The ZODIAC Glossary: A Cross-Cultural Glossary of Ancient Astral Science. Available at: https://zodiacglossary.github.io/lemma/2882/ (Accessed: February 2, 2026).
BibTeX 
@misc{zodiac2882,
	note = {[Online; accessed 2026-02-02]},
	author = {Zellmann-Rohrer, Michael},
	year = {2025},
	title = {Πτιαῦ ({Lemma} #2882)},
	url = {https://zodiacglossary.github.io/lemma/2882/},
	howpublished = {https://zodiacglossary.github.io/lemma/2882/},
}