Submitted Name Save Type Political Subdivision Usage Norwegian Pronounced Pron. UUST-fawl [key·IPA] Edit Status Status [history·contributorshide contributors] Added 5/7/2019 by sep780 Edited 9/15/2020 by Mike C Meaning & History From the old name of the Olsofjord fold and the Norwegian word øst. The name means, "the region east of the fold."Østfold is a fylke (county) in NORWAY.