Akademik

Sosibios
(fl. 240–204 BC)
   Chief minister of Ptolemy IV. He came from Alexandria. He arranged the murder of the king’s uncle, brother, and mother upon his accession. Later, upon the king’s death, he murdered the queen, who was to be regent for her son, Ptolemy V, and took over power together with the late king’s mistress, Agathoclea, and her brother, Agathocles. Sosibios died in 204 BC. His associates were overthrown and killed in 203 BC, but his son, Sosibios was briefly guardian for the king.
   See also Arsinoe III; Berenice II.
Historical Dictionary Of Ancient Egypt by Morris L. Bierbrier

Ancient Egypt. A Reference Guide. . 2011.