Mentioned as Dirich Fiskes grendh in 1617, Diedrik Fischers gränd in 1674, and Diedrich Ficks Gränd in 1800, the alley is named after a merchant and innkeeper, most likely bearing the genuine name Didrich Fischer and immigrating from Germany. The man in question is mentioned in 1620 as living in a building in the alley owned by an Erik Jöransson Tegel. The alley was named Jöran Perssons gränd in 1563 after the latter's father, Jöran Persson, one of the advisers of King Eric XIV. The name of the alley appears as Swedish variations of the name the German man, before being named Didrich Fischs gränd on a map dated 1733.
