In traditional accounts, Laozi's personal name is usually given as Li Er (李耳, Old *Rəʔ Nəʔ,[4] Mod. Lǐ Ěr) and his courtesy name as Boyang (trad. 伯陽, simp. 伯阳, Old *Pˤrak-lang,[4] Mod. Bóyáng). A prominent posthumous name was Li Dan (李聃, Lǐ Dān).[5][6][7]