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In all the world, เอ๋อ (Er , Oe , Erwe ) is a common gender-neutral first name. The forename เอ๋อ is habitual in Albania, where it is quite a common unisex name, Macao, where it is quite a rare male name, and Qatar. Not in comparison with a country's population, this name is the most popular in Indonesia, India, and the Democratic Republic of the Congo. Likewise, เอ๋อ is the last name as well as the forename.
เอ๋อ is also a name for the fictitious and mythical characters: Er Conde del Guácharo ; Er , the biblical character; eldest son of Judah; husband of Tamar; killed by God due to his wickedness, although no details are given, Genesis 38; Er Yatou , the Dream of the Red Chamber character and Er Monnezza , character in Free Hand for a Tough Cop.