He is married to Athenais van Commagene.
They got married before 30 BC.Source 3
"In the surviving coinage of Athenais and Artavasdes I, appears on one side a portrait of Artavasdes I wearing his crown showing his royal title in Greek, while on the other side a portrait is shown of Athenais with her royal title in Greek wearing a turreted tiara as a Diadem. These coins are dated from circa 30 BC from his kingship.[5][6]"
Child(ren):
[PART121] http://mauriceboddy.org.uk/Parthia.htm#PARTHIA
[PART131] http://mauriceboddy.org.uk/Parthia.htm#PARTHIA
https://en.wikipedia.org/wiki/Athenais_of_Media_Atropatene