Aristion in Harpers Dictionary of Classical Antiquities
（Ἀριστίων). A philosopher who, by the influence of Mithridates, made himself tyrant of Athens. He committed suicide, on the capture of Athens by Sulla in B.C. 87.
Aristo of Alexandria in Wikipedia
Aristo (or Ariston, Greek: Ἀρίστων) of Alexandria, was a Peripatetic philosopher, and a contemporary of Strabo in the 1st century. He wrote a work on the Nile. Eudorus, a contemporary of his, wrote a book on the same subject, and the two works were so much alike, that the authors charged each other with plagiarism. Who was right is not said, though Strabo seems to be inclined to think that Eudorus was the guilty party.