Waldorf, Maryland General Assembly of Maryland by an act changed the name to "Waldorf" in honor of William Waldorf Astor (1848–1919), the great-grandson of John Jacob Astor (1763–1848), who was born in Walldorf, Palatinate, Germany. On July 29, 1908, the city of Plumb Valley in Waseca County, Minnesota, changed its name to Waldorf after Waldorf, Maryland. Once a tobacco market village, Waldorf came to prominence in the 1950s as a gambling destination after slot machines were legalized in Charles County in 1949. The boom lasted until 1968 when gambling was once again outlawed. Its subsequent substantial growth as a residential community began
William Waldorf Astor William Waldorf Astor William Waldorf "Willy" Astor, 1st Viscount Astor (March 31, 1848 – October 18, 1919) was a wealthy American-born attorney, politician, businessman, and newspaper publisher. He moved with his family to England in 1891, became a British subject in 1899, and was made a peer as Baron Astor in 1916 and Viscount Astor in 1917 for his contributions to war charities. He was a prominent member of the Astor family. William Waldorf Astor was born in New York City. He was the only child of financier and philanthropist John Jacob Astor III (1822–1890) and Charlotte Augusta Gibbes (1825–1887).