From 1906–1909 John’s grandsons George and Alexander II expanded the line and introduced the colour names. In 1908, when James Stevenson was the Managing Director, there was a re-branding of sorts. The whisky was renamed from Walker's Kilmarnock Whiskies to Johnnie Walker Whisky. In addition, the slogan, "Born 1820 – Still going Strong!" was created, along with the Striding Man, a figure used in their advertisements for around fifty years.They dropped Johnnie Walker White during World War I. In 1932, Alexander II added Johnnie Walker Swing to the line.