Question: What beer led ot the creation of Cream ale?

Context articles: Kilkenny (beer)
Swamp Head Brewery
OpenRoad Brewery
Genesee Cream Ale
Cameron's Brewing Company
Kentucky common beer
Heavy Seas Beer
Cream ale
Rocket Republic Brewing Company
Beer in Canada

Kilkenny is a nitrogenated Irish cream ale from the makers of Guinness, which originated in Kilkenny, Ireland.
 The brand is managed and produced by Diageo.
 It is available in draught, bottles and cans.
 It is brewed in Ireland and its heritage dates back to the 14th century.
Swamp Head Brewery is a brewery in Gainesville, Florida and is frequented by graduate and professional students, faculty, and locals.
 Year-round offerings include Wild Night Honey Cream Ale, Cottonmouth Belgian Witbier, Stump Knocker Pale Ale, Midnight Oil Oatmeal Coffee Stout, and Big Nose IPA along with many different seasonal and limited release beers.
 Swamp Head brews their beer using a 30 Barrel brewhouse (930 Gallons) and is located on SW 34th Street just south of Archer Road and near I-75 in Gainesville, Fl.
OpenRoad Brewery is a brewery and tap room in Wayland, Michigan.
 OpenRoad brews a variety of craft beers, including the Road Rage Double IPA, I.P.A. Lot, Citradisiac Pale Ale, My Coffee Stout, Bumpy Ride Brown, 90 mph IPA, Pennywise Porter, Good Rye-Brations IPA, Yell-Ale Submarine and Campout Cream Ale.
 Several seasonal and experimental brews are planned.
 The brewery opened in 2016.
Genesee Cream Ale is a cold fermented, alcohlic beverage produced by the Genesee Brewing Company in Rochester, NY.
 It is a light bodied ale.
 It was first introduced in late 1960.
 Genesee's brewmasters take an extra step of kräusening, a process in which finished beer is primed for carbonation with wort instead of sugar.
Cameron's Brewing Company is a brewery just outside Toronto in Oakville, Ontario, Canada.
 Founded in 1997, Cameron's produces many different beers including 4 core beers, Cameron's Cream Ale, Cameron's Auburn Ale, Cameron's Lager and Cameron's RPA (Rye Pale Ale).
Kentucky Common Beer is a once-popular style of ale from the area in and around Louisville, Kentucky from the 1850s until Prohibition.
 This style is rarely brewed commercially today.
 It was also locally known as "Dark Cream Common Beer", "Cream Beer" or "Common Beer".
 The beer was top-fermented and wasn't krausened, i.e., it was fermented once and sent out for sale which meant the gravity would be moderate, the carbonation low and the taste full and sweetish.
 Like cream ale, it was consumed fresh, usually as draught beer.
 In 1913 it was estimated that 80% of the beer consumed in Louisville was of this type.
 Many local breweries made this style of beer exclusively.
Heavy Seas Beer is brewed by Clipper City Brewing Company, in Baltimore, Maryland.
 The brewery was established by Hugh Sisson in 1995.
 Previously, Sisson operated Maryland's first brewpub, Sisson's.
 In 2010, the brewery rebranded.
 While the name of the company remains Clipper City Brewing Company, all of its beer falls under the Heavy Seas brand.
 Heavy Seas hosts tours on most weekends.
 It is located at 4615 Hollins Ferry Road, Suite B, in the Halethorpe section of Baltimore.
 Heavy Seas currently offers a variety of beer styles in approx. 18 states within the United States.
 Several Heavy Seas beers have been awarded and include the following: Cutlass Amber Lager (a repeat medal winner at the Great American Beer Festival from 2006-2010, bronze medal winner at the 2010 World Beer Cup and silver medal winner at the 2012 World Beer Cup as Heavy Seas Märzen), Powder Monkey Pale Ale (silver medal winner at the 2008 Great American Beer Festival and bronze medal winner at the 2010 World Beer Cup as Heavy Seas Pale Ale), Small Craft Warning Uber Pils (bronze medal winner at the 2004 Great American Beer Festival), Gold Ale (gold medal winner at the 2010 World Beer Cup, bronze medal winner at the 2010 Great American Beer Festival and bronze medal winner at the 2014 Great American Beer Festival as Heavy Seas Gold Ale) and Winter Storm Imperial ESB (gold medal winner at the 2008 World Beer Cup).
Cream ale is a style of American and Canadian beer, of which examples are often light in color and are well attenuated.
 First crafted in the mid-1800s at various breweries in the United States, and in Canadian breweries such as Sleeman, cream ale remained a very localized form with different styles until the early 20th century.
 During Prohibition in the United States, a great number of Canadian brewers took up brewing cream ale, refining it to some degree.
 Following the end of Prohibition in the United States, cream ale from Canada became popular and the style was produced anew in both nations.
Rocket Republic Brewing Company, Inc. is a craft brewery located in Madison, Alabama incorporated in Alabama in March 2013.
 The brewery received their state ABC license in July 2013 and successfully launched their beers on September 6, 2013.
 The launch day was held at The Nook, a beer bar in Huntsville, Alabama and launch beers were Vapor Trail Cream Ale and Astronut Brown Ale.
 Rocket Republic is owned by Eric Crigger (brewer), Tatum Crigger, John Troy and Lynn Troy.
Beer in Canada was introduced by European settlers in the seventeenth century.
 The first commercial brewery was La Brasseries due Roy [sic] started by New France Intendant Jean Talon, in Québec City in 1668.
 Many commercial brewers thrived until Prohibition in Canada.
 The provincial and federal governments' attempt to eliminate "intoxicating" beverages led to the closing of nearly three quarters of breweries between 1878 and 1928.
 It was only in the second half of the twentieth century that a significant number of new breweries opened up.
 The Canadian Beer industry now plays an important role in Canadian identity, though globalization of the brewing industry has seen the major players in Canada acquired by, or merged with, foreign companies, notably its three largest beer producers, Labatt, Molson and Sleeman.
 The result is that Moosehead, with an estimated 3.8 percent share of the domestic market in 2016, has become the largest fully Canadian-owned brewer.