About William Lyons
Sir William Lyons, known as "Mr. Jaguar", was with fellow motorcycle enthusiast William Walmsley, the co-founder in 1922 of the Swallow Sidecar Company, which became Jaguar Cars Limited after the Second World War. The first "Jaguar" model was offered in 1935, and after World War II, Lyons changed the company name to Jaguar to avoid the unfortunate connotations with the Nazi SS "Schutzstaffel". Although he had no direct involvement with its design, allegedly Lyons was shown the finished final prototype of the XJ40 shortly before his death in 1985 and was said to be "approving" of what was the replacement for the first generation XJ6.
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.