Arrian's chief authorities were, as he tells us, Aristobulus of Cassandreia and Ptolemy, son of Lagus (afterwards king of Egypt), who both accompanied Alexander on his campaigns.
Thais subsequently became the wife of Ptolemy Lagus, king of Egypt.
Lagus, Helsingfors, 1854) (on the Seljuks of Asia Minor exclusively, but of little value).
The Plolemaic Period.On the division of Alexanders dominions in 32!3 B.C., Egypt fell to Ptolemy the son of Lagus, the founder of the Ptolemaic dynasty (see PTOLEMIES).
The founder, Ptolemy (IlToXE,uc os), son of Lagus, a Macedonian nobleman of Eordaea, was one of Alexander the Great's most trusted generals, and among the seven "body-guards" attached to his person.
Berenice, daughter of Lagus, wife of an obscure Macedonian soldier and subsequently of Ptolemy Soter, with whose bride Eurydice she came to Egypt as a lady-in-waiting.