Agathocles was a Greek

Greeks

The Greeks, also known as the Hellenes , are a nation and ethnic group native to Greece, Cyprus and neighboring regions. They also form a significant diaspora, with Greek communities established around the world....

 nobleman who was a contemporary to King Philip II of Macedon

Philip II of Macedon

Philip II of Macedon "friend" + ἵππος "horse" — transliterated ; 382 – 336 BC), was a king of Macedon from 359 BC until his assassination in 336 BC. He was the father of Alexander the Great and Philip III.-Biography:...

 who reigned 359 BC-336 BC.

Agathocles was a Thessalian

Thessaly

Thessaly is a traditional geographical region and an administrative region of Greece, comprising most of the ancient region of the same name. Before the Greek Dark Ages, Thessaly was known as Aeolia, and appears thus in Homer's Odyssey....

 Serf

Serfdom

Serfdom is the status of peasants under feudalism, specifically relating to Manorialism. It was a condition of bondage or modified slavery which developed primarily during the High Middle Ages in Europe and lasted to the mid-19th century...

 from Crannon

Krannonas

Krannonas , ancient Crannon , is a village and a former municipality in the Larissa regional unit, Thessaly, Greece. Since the 2011 local government reform it is part of the municipality Kileler, of which it is a municipal unit. It is located southwest of the regional capital Larissa...

. His father’s name may have been Alcimachus. It was through his flattery, that Agathocles became an intimate friend of Philip II.

Philip II raised him to high rank. Agathocles was granted Macedonian citizenship for himself and his family. Agathocles shared in Philip II’s councils and Phillip II sent him to deal with the Perrhaebi

Perrhaebi

The Perrhaebi were an ancient Greek people who lived in northern Thessaly. They took part in the Trojan War under Guneus and also fought in the Battle of Thermopylae. Their capital was Phalanna, and their most significant town, or polis, was Oloosson...

 and Agathocles took charge of affairs in that area.

There is a possibility that Phillip II rewarded Agathocles for his services with estates in Pella

Pella

Pella , an ancient Greek city located in Pella Prefecture of Macedonia in Greece, was the capital of the ancient kingdom of Macedonia.-Etymology:...

. Agathocles became a favorite in the Argead court

Argead dynasty

The Argead dynasty was an ancient Greek royal house. They were the ruling dynasty of Macedonia from about 700 to 310 BC. Their tradition, as described in ancient Greek historiography, traced their origins to Argos, in southern Greece...

 in Pella and his family assimilated into Macedonian society.

Agathocles married an unnamed Greek woman, a local Thessalian, perhaps a woman called Arsinoe. With his wife they had four sons:

• Alcimachus
  Alcimachus of Apollonia
  Alcimachus of Apollonia was a Greek nobleman who was a Macedonian Thessalian who served as an official. He was an active diplomat and administrator in the latter reign of King Philip II of Macedon who reigned 359 BC–336 BC and the first years of his son, King Alexander the Great reigned 336 BC–323...
  
  
• Lysimachus
  Lysimachus
  Lysimachus was a Macedonian officer and diadochus of Alexander the Great, who became a basileus in 306 BC, ruling Thrace, Asia Minor and Macedon.-Early Life & Career:...
  
  , one of the Diadochi
  Diadochi
  The Diadochi were the rival generals, family and friends of Alexander the Great who fought for the control of Alexander's empire after his death in 323 BC...
  
   of Alexander the Great
• Autodicus
  Autodicus
  Autodicus also known as Autodikos, Autolycus and Autolykos was a Greek nobleman who was a Macedonian Thessalian who served as an official....
  
  
• Philip
  Philip (son of Agathocles of Pella)
  Philip was a Greek nobleman who was a Macedonian Thessalian.Philip was the youngest of four sons born to Agathocles and his wife, perhaps named Arsinoe...
  
  

Sources

• Ancient Library Article: Agathocles no.1
• Lysimachus’ article at Livius.org
• H.S. Lund, Lysimachus: A Study in Early Hellenistic Kingship, Routledge, 2002
• W. Heckel, Who’s who in the age of Alexander the Great: prosopography of Alexander’s empire, Wiley-Blackwell, 2006