The Berenice IV of Egypt reference article from the English Wikipedia on 24-Apr-2004
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Berenice IV of Egypt

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Berenice IV, daughter of Ptolemy XII of Egypt and probably Cleopatra V of Egypt Tryphaena, sister of Cleopatra VI of Egypt Tryphaena, the famous Cleopatra VII (loved by Julius Caesar and Mark Antony). Berenice dethroned her father in 56 BC and became co-regent with her mother. They ruled Egypt for a year, until Ptolemy XII returned from exile and murdered Berenice.