Name of Mexico of the country is the "United Mexican States" (), since it is a federation of thirty-two states. The official name was first used in the Constitution of 1824, and was retained in the constitutions of 1857 and 1917. Informally, "Mexico" is used along with "Mexican Republic" ("República Mexicana"). On 22 November 2012, outgoing Mexican President Felipe Calderón proposed changing the official name of the country to "México". Anahuac (meaning land surrounded by water) was the name in Nahuatl given to what is now Mexico during Pre-Hispanic times. When the Spanish conquistadors besieged México-Tenochtitlan in 1521, it was almost completely destroyed.
Name of Argentina "equivalent and valid" denominations. Then on October 8, 1860, President Santiago Derqui decreed the official name to be República Argentina. In common speech, the country is referred to as "la Argentina" (the Argentine) in Spanish, bypassing the noun in any of the above expressions ("the Argentine [land]", "the Argentine [Republic]", etc.). Name of Argentina The name of Argentina (a Spanish adjective meaning "silvery"), traditionally called the Argentine in English, is ultimately derived from the Latin "argentum" "silver" and the feminine of the adjectival suffix -īnus, the Latin "argentum" has its origin from the ancient Greek-Hellenic word "argyro(s)", άργυρο(ς) meaning silver.