Berenice I (; c. 340 BC – between 279 and 268 BC) was Queen of Egypt by marriage to Ptolemy I Soter. She became the second queen, after Eurydice, of the Ptolemaic dynasty of Egypt.
Life
Family
Berenice was originally from Eordaea. She was the daughter of princess Antigone of Macedon, and an obscure local, a Macedonian nobleman called Magas. Her maternal grandfather was a nobleman called Cassander who was the brother of Antipater, the regent for Alexander's empire, Pyrrhus gave her name to a new city called Berenicis.
Philip died around 318 BC.
Queen of Egypt
thumb|right|Berenice I with her second husband [[Ptolemy I Soter]]
thumb|Portraits of Berenice I and Ptolemy I Soter on a golden octodrachm minted in Alexandria in c. 265 BC
After the death of her first husband, Berenice travelled to Egypt with her children as a lady-in-waiting for her mother's first cousin Eurydice who was the wife of Ptolemy I. Ptolemy I was one of the generals of King Alexander the Great and founder of the Ptolemaic dynasty of Ancient Egypt.
Berenice became involved in a relationship with Ptolemy I, who married her in 317 BC. Berenice became the mother of Arsinoe II, Philotera, and a son, Ptolemy II Philadelphus.