"Fetter Lane ran north-south between Holborn and Fleet Streets, in the ward of Farringdon Without, past the east side of the church of Saint Dunstan's in the West. Stow consistently called this street "Fewtars Lane," "Fewter Lane," or "Fewters Lane" (2:21, 2:22), and claimed that it was "so called of Fewters (or idle people) lying there" (2:39). The OED defines "faitour" as "[a]n impostor, cheat; esp. a vagrant who shams illness or pretends to tell fortunes" (OED "faitour" 1.a), and notes that the word was obsolete by 1568, which may explain why Stow needed to gloss the term."
Fascinating, isn't it, what we learn from doing good puzzles.