The article argues that the genuine first name of Philo of Larissa was in fact ‘Philio’. This claim is based on two new readings ‘Philio’ in our earliest (certain) source for the name, Philodemus’ Index Academicorum, which put other early evidence into perspective. Three other essentially independent and reliable witnesses have the reading ‘Philio’ too. Furthermore, several Cicero manuscripts preserve various examples of the alternative reading ‘Philio’. The reading ‘Philo’ in some other sources might be a mistake or a kind of nickname.
