Hallgrímsson is a surname of Icelandic origin, meaning son of Hallgrímur. In Icelandic names, the name is not strictly a surname, but a patronymic. The name refers to: Asgeir Örn Hallgrimsson (b. 1984), Icelandic professional handball player. Geir Hallgrímsson (1925–1990), Icelandic politician; Prime Minister of Iceland 1974–78; mayor of Reykjavík 1959–72. Hafliði Hallgrímsson (b. 1941), Icelandic composer. Jónas Hallgrímsson (1807–1845), Icelandic poet and author. Hallgrim Eagle Hallgrimsson, fictional police officer from the Danish TV Series The Eagle: A Crime Odyssey.
https://en.wikipedia.org/wiki/Hallgr%C3%ADmsson