Heidenstam or von Heidenstam is a surname. Notable people with the surname include: Gustaf von Heidenstam (1822–1887), Swedish engineer Verner von Heidenstam (1859–1940), Swedish poet and novelist Hugo von Heidenstam (1884–1966), Swedish diplomat and engineer Oscar Heidenstam (1911–1991), Cyprus-born British bodybuilder Swedish-language surnames