Usono

Usono was reported in English-language media as early as 1907. The term Usonia (see) was debated in US American newspapers as early as 1903, and Usona (see) was proposed in Canada as early as 1885.

• The initial letters of the words United States of North America form the word Usona. As the terminal “a” is the sign of the adjective in Esperanto, and “o” that of the noun, Esono [sic] comes naturally into existence […] . Lingvo Internacia, an Esperanto magazine published in Paris, was the first universal language periodical to make regular use of the word Usono and its derivatives, and Esperantists all over the world seized upon it gratefully. (1907, “The Usonians—You Are One. And T. Roosevelt is the Usonestro—The United States in Esperanto”, In The Gateway, vol. IX, no. 1, page 25): 

Zamenhof used this name in his speech at the 1910 World Congress of Esperanto in Washington, D.C. The online Esperanto dictionary Reta Vortaro attributes the word to Frank Lloyd Wright.[1] However, there are no indications Wright knew the word this early:

• It has been suggested that Wright picked up the name on his first European trip in 1910 when there was talk of calling the U.S.A. 'U-S-O-N-A', to avoid confusion with the new Union of South Africa. (1984, John Sergeant, Frank Lloyd Wright's Usonian Houses: The Case for Organic Architecture, page 16):

• The word "Usonia" first appears in Wright's writings in 1925. (1997, Bruce Brooks Pfeiffer, David Larkin, Frank Lloyd Wright: Master Builder, page 102):