If you want to be a right pedant (smart ass) then you can show up your other class-mates by telling them that Cleopatra VII was (technically) not
the last ruler of Egypt. She was briefly succeeded by her son Caesarion, who ruled 'by right' after his mother's suicide.
Caesarion means 'little Caesar,' and the full name of the last ruler (if you want to baffle anyone) was Ptolemy the Fifteenth, Philopator-Philometor Caesar. He was put to death on the order of another Caesar, Caesar Octavius, who feared that Caesarion might usurp his rule later on if he was allowed to age. Octavius' advisors claimed that "it would be unwise to have too many Caesars," and so he was put to death upon his capture, just after the Summer of 30BC (so I believe).
Caesarion became the tragic subject of this poem by Cavafy: