William Rosenberg, American entrepreneur, founded Dunkin' Donuts (died 2002)

William Rosenberg was an American entrepreneur who founded the Dunkin' Donuts franchise in 1950 in Quincy, Massachusetts, one of the pioneers in name-brand franchising, originally named the "Open Kettle" doughnut shop when established in 1948. At the end of 2011, there were more than 10,000 outlets of the chain in 32 countries.

DD IP Holder LLC, doing business as Dunkin', and originally Dunkin' Donuts, is an American multinational coffee and doughnut company, as well as a quick service restaurant. It was founded by Bill Rosenberg in Quincy, Massachusetts, in 1950. The chain was acquired by Baskin-Robbins' holding company Allied Lyons in 1990, its acquisition of the Mister Donut chain and the conversion of that chain to Dunkin' Donuts facilitated the brand's growth in North America that year.