Charles Rennie Mackintosh (1868-1928). Scottish designer and architect who played a major role in the international art nouveau movement. His designs were noted for soft curves and straight lines, and he favored white-painted wood.
A raincoat, specifically designed in a waterproof rubberized cotton developed in the 1820s by Scottish inventor Charles Macintosh. Nowadays, the mackintosh is a more general term for any waterproof jacket. Which can also be called a mac.
A Mackintosh or its short name mac is a form of waterproof raincoat, first sold in 1824, made out of rubberized fabric. The Mackintosh is named after its Scottish inventor Charles Macintosh: note the added letter 'k' in the name of the garment.