Sextus (abbreviated Sex., the feminine form is Sexta, not to be confused with Sixtus) is a common ancient Roman praenomen. It probably means "sixth" (cf. Latin sextus, "sixth"). Parallel praenomina are Secundus, Tertius, Quintus, Septimus, Octavius and Decimus. These names do not necessarily denote the order in which their bearers were born.
Among those named Sextus are: