Grosvenor Square (W1) Named from Grosvenor House, the residence of the Duke of Westminster. At No. 2 in this street lived Lord Erskine ; at No. 16, the first Sir Robert Peel; at No. 18, Lord Crewe, in 1809. (Mayfair, G. E. Mitton, p. 17) At his house in this street died William, Duke of Cumberland, the victor of Culloden, in 1765. (Reference: Jesse's London, vol. I, p. 40)