Parmys was a Persian

Achaemenid Empire

The Achaemenid Empire , sometimes known as First Persian Empire and/or Persian Empire, was founded in the 6th century BCE by Cyrus the Great who overthrew the Median confederation...

 princess, the only daughter of Bardiya

Bardiya

Bardiya was a son of Cyrus the Great and the younger brother of Cambyses II, both Persian kings. There are sharply divided views on his life, he may have ruled the Achaemenid Empire for a few months in 522 BCE, or he may have been impersonated by a magus called Gaumata. -Name and sources:The...

 (Smerdis), son of Cyrus the Great

Cyrus the Great

Cyrus II of Persia , commonly known as Cyrus the Great, also known as Cyrus the Elder, was the founder of the Achaemenid Empire. Under his rule, the empire embraced all the previous civilized states of the ancient Near East, expanded vastly and eventually conquered most of Southwest Asia and much...

. She was the grand daughter of Cyrus the Great, and Cassandane

Cassandane

Cassandane was an Achaemenian Persian noblewoman and the "dearly loved" wife of Cyrus the Great. She was a daughter of Pharnaspes. She bore four children for Cyrus the Great : Cambyses II who succeeded his father and conquered Egypt, Smerdis who also reigned as the king of Persia for a short...

.

When Darius the Great (Darius I) seized the Achaemenid throne, he married two daughters (Atossa

Atossa

Atossa was an Achaemenid queen and daughter of Cyrus the Great and his wife, Cassandane...

 and Artystone

Artystone

Artystone was a Persian princess, daughter of king Cyrus the Great, and sister or half-sister of Atossa and Cambyses II. Along with Atossa and her niece Parmys, Artystone married king Darius I...

) of Cyrus the Great and later on his granddaughter (Parmys). Parmys bore him a son called Ariomardus.

Sources

• Herodotus
  Herodotus
  Herodotus was an ancient Greek historian who was born in Halicarnassus, Caria and lived in the 5th century BC . He has been called the "Father of History", and was the first historian known to collect his materials systematically, test their accuracy to a certain extent and arrange them in a...
  
  , III, 88; VII, 78
• Persepolis Fortification Tablets (where she is called Uparmiya)