Iwaszkiewicz is a Polish surname. East Slavic variant: Ivashkevich. Notable people include:
Anna Iwaszkiewicz (1897-1979), Polish writer Jarosław Iwaszkiewicz (1894–1980), Polish writer and communist politician Piotr Iwaszkiewicz (1959–2021), Polish historian and diplomat Robert Iwaszkiewicz (born 1962), Polish politician Wacław Iwaszkiewicz-Rudoszański (1871–1922), Polish general
See also