Ionesco is a Romanian surname, a variant spelling of Ionescu. It is a patronymic surname meaning "son of Ion", the Romanian form of John. The name John ultimately derives from the Hebrew Yoḥanan, meaning "Yahweh is gracious". The surname Ionesco is particularly famous due to the French-Romanian playwright Eugène Ionesco (1909–1994), a leading figure in the Theatre of the Absurd. Born Eugen Ionescu in Romania, he later Frenchified his surname to Ionesco. His plays, such as The Bald Soprano and Rhinoceros, explore themes of conformity, language, and the absurdity of modern life. The standard form Ionescu is common in Romania, with numerous notable bearers including Alexandru Ionescu (socialist militant), Cassius Ionescu-Tulcea (mathematician), and Nae Ionescu (philosopher). The variant Ionesco, though less common, persists due to the playwright's renown. The name is part of a broader family of Slavic and Romanian patronymics derived from John, such as Russian Ivanov (son of Ivan) and Armenian Hovhannisyan. Meaning: “Son of Ion” (John) Origin: Romanian Type: Patronymic surname Usage regions: Romania, diaspora communities