Chimay

Etymology 1
From, sometimes further derived via , from.

Translations

 * Walloon:

Etymology 2
Variant of earlier, from   in João de Barros's 1553 Décadas da Ásia, Dec. III, Bk. II, presumably from the and  in manuscripts of 's Peregrinação, variously referring to an imaginary lake and to the kingdom and town of Chiang Mai in northern Thailand,, from  +.

Proper noun

 * 1)  An imaginary lake thought for centuries to exist in southern China or northern Indochina, once believed to be the source of the Brahmaputra or Meghna, the Irrawaddy, the Salween, and the Chao Phraya Rivers.
 * 2) * 1771, Encyclopaedia Britannica, 1st ed., Vol. II, p. 184:
 * CHIMAY, the name of a great lake, lying in the province of Acham, between the Eaſt-Indies and China.