Actaeus was the first king of Attica

Attica

Attica is a historical region of Greece, containing Athens, the current capital of Greece. The historical region is centered on the Attic peninsula, which projects into the Aegean Sea...

, according to Pausanias

Pausanias (geographer)

Pausanias was a Greek traveler and geographer of the 2nd century AD, who lived in the times of Hadrian, Antoninus Pius and Marcus Aurelius. He is famous for his Description of Greece , a lengthy work that describes ancient Greece from firsthand observations, and is a crucial link between classical...

. He was the son of Erysichthon

Erysichthon

In Greek mythology, Erysichthon can refer to two different personages:-Erysichthon of Thessaly:...

, father of Agraulus, and father-in-law to Cecrops

Cecrops I

Cecrops was a mythical king of Athens who is said to have reigned for fifty-six years. The name is not of Greek origin according to Strabo, or it might mean 'face with a tail': it is said that, born from the earth itself, he had his top half shaped like a man and the bottom half in serpent or...

, the first king of the city of Athens. Actaeus is said to have ruled over a city named Acte or Akte. The location of this city is uncertain. The tradition states that Actaeus gave Attica

Attica

Attica is a historical region of Greece, containing Athens, the current capital of Greece. The historical region is centered on the Attic peninsula, which projects into the Aegean Sea...

 its name before it was changed to Cecropia by Cecrops. Actaeus had three daughters - Agraulos, Herse

Herse

Herse is a figure in Greek mythology, daughter of Cecrops, sister to Aglauros and Pandrosos.According to Apollodorus, when Hephaestus unsuccessfully attempted to rape Athena, she wiped his semen off her leg with wool and threw it on the ground, impregnating Gaia...

, and Pandrosus

Pandrosus

Pandrosus was a figure in Greek mythology, and a daughter of Cecrops, sister to Herse and Aglauros....

 - but no sons and was therefore succeeded by Cecrops, the husband of Agraulos.

According to Apollodorus

Apollodorus

Apollodorus of Athens son of Asclepiades, was a Greek scholar and grammarian. He was a pupil of Diogenes of Babylon, Panaetius the Stoic, and the grammarian Aristarchus of Samothrace...

, on the other hand, Cecrops was the first king of Attica, and the three daughters were his own.

Another Actaeus is mentioned in Greek mythology as the father of Telamon

Telamon

In Greek mythology, Telamon , son of the king Aeacus, of Aegina, and Endeis and brother of Peleus, accompanied Jason as one of his Argonauts, and was present at the hunt for the Calydonian Boar. In the Iliad he was the father of Greek heroes Ajax the Great and Teucer the Archer by different...

, and grandfather of Ajax

Ajax (mythology)

Ajax or Aias was a mythological Greek hero, the son of Telamon and Periboea and king of Salamis. He plays an important role in Homer's Iliad and in the Epic Cycle, a series of epic poems about the Trojan War. To distinguish him from Ajax, son of Oileus , he is called "Telamonian Ajax," "Greater...

 of Salamis

Salamis Island

Salamis , is the largest Greek island in the Saronic Gulf, about 1 nautical mile off-coast from Piraeus and about 16 km west of Athens. The chief city, Salamina , lies in the west-facing core of the crescent on Salamis Bay, which opens into the Saronic Gulf...

.