David L. Clark

David Lytle Clark (26 September 1864 – 3 February 1939) was an American entrepreneur who came to the U.S. with his family when he was 8 years old, and who founded the D. L. Clark Company in 1886 in Allegheny, Pennsylvania now part of Pittsburgh.

Its creations include the Clark bar and the Zagnut. Over the years the Clark Company has been bought and sold several times and is currently a holding of Necco (New England Confectionery Company).

...
Wikipedia