Eua or EUA may refer to: Places ʻEua, Tonga Eua (Cynuria), an ancient town of Cynuria, Greece Eva, Arcadia, Greece United States of America (French: ; Portuguese: ; Spanish: ; Tagalog: ) Other uses Emergency Use Authorization, a legal means for the U.S. Food and Drug Administration to approve new medical treatments during a declared emergency EU Allowance, climate credits used in the European Union Emissions Trading Scheme Eua (gastropod), a genus of snail ʻEua Airport, in Tonga Eua Sunthornsanan (1910–1981), Thai musician European Unit of Account, a predecessor of the euro European University Association United Team of Germany which competed in the 1956, 1960, and 1964 Olympic Games