fratricida
From LSJ
αἰτῶ δ' ὑγίειαν πρῶτον, εἶτ' εὐπραξίαν, τρίτον δὲ χαίρειν, εἶτ' ὀφείλειν μηδενί → first health, good fortune next, and third rejoicing; last, to owe nought to any man
Latin > English (Lewis & Short)
frātrĭcīda: ae, m. frater-caedo,
I one who murders a brother, a fratricide, Nep. Timol. 1; Cic. pro Domo, 10, 26.