What is aristo?

Some articles on aristo:

Aristo Of Ceos
... Aristo of Ceos (Greek Ἀρίστων ὁ Κέως fl ... He is not to be confused with Aristo of Chios, a Stoic philosopher of the mid 3rd century BC ... After the death of Lyco, (around 225 BC), Aristo probably succeeded him as the head of the school ...