Primus
From LSJ
εἰς πέλαγος σπέρµα βαλεῖν καὶ γράµµατα γράψαι ἀµφότερος µόχθος τε κενὸς καὶ πρᾶξις ἄκαρπος → throwing seeds and writing letters at sea are both a vain and fruitless endeavor
(2) Prīmus,¹¹ ī, m., surnom chez les Cornelii, les Antonii : Tac. H. 3, 74 ; Ann. 14, 40.