Frögärd Ulvsdotter i Ösby (11th century) was a Swedish Norse woman. She was according to a common misconception believed to be a Viking Age female runemaster. This notion is based on Erik Brate's Erik Brate: Svenska runristare (Swedish runmasters) (1925), p. 13 erroneous interpretation of runestone U 203. As early as 1943, Elias Wessén convincingly demonstrated that the sequence in question cannot be read as a carver's signature.Upplands runinskrifter 1, s. 307 ff. Also, the place name uisby should be read Väsby rather than Ösby.
