（*)Alkibia/dhs), the son of Cleinias, was born at Athens about B. C. 450, or a little earlier. His father fell at Coroneia B. C. 447, leaving Alcibiades and a younger son. (Plat. Protag. p. 320a.)
The last campaign of the war with Potidaea was in B. C. 429. Now as Alcibiades served in this war, and the young Athenians were not sent out on foreign military service before they had attained their 20th year, he could not have been born later than B. C. 449. If he served in the first che Spartan family to which the ephor Endius belonged, with which that of Alcibiades had been anciently connected by the ties of hospitality.
The first who bore the name was the grandtlather of the great Alcibiades.
On the death of his father (B. C. 447), Alcibiades was left to the guardianship of his relations Pericles and Ariphron. † Agariste, the mother of Pericles and Ariphon, was the daughter of Hippocrates, whose brother Cleisthenes was the grandfather of Deinomache. (Hdt. 6.131; Isocr.