Family name Alas (A 
, Alas 
, Lassus 
) , worldwide, is a prevalent cognomen. The surname Alas is habitual in El Salvador, where it is a common surname, Venezuela, and Indonesia (explore the name in all countries). Not in comparison with a country's population, this name is the most popular in China, Indonesia, and India. More prevalently, Alas is the forename as well as the last name.
| VARIANT | COUNTRY |
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| A | Netherlands, China, Indonesia, Canada, India |
| Alas | China, Indonesia, Canada, Myanmar, India |
| Lassus | France, Spain, United Kingdom, United States, India |
| Алас | Kazakhstan, Russia, Kyrgyzstan, Ukraine |
| esteban de las alas Spanish sailor, ES (b. 1501) |
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| ignacio alas Mexican politician, MX (b. 1780) |
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severino de las alas Filipino educator and politician (1851-1918), PH (b. 1851) |
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leopoldo alas Spanish author, ES (b. 1852) |
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| josé maría de las alas (b. 1853) |
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| ciriaco de jesus alas Salvadoran composer (1866-1952), SV (b. 1866) |
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| juhan alas EE (b. 1874) |
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jose inocencio alas Peasants rights advocate, SV (b. 1934) |
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| antonio de las alas Filipino politician (1889-1983), PH (b. 1889) |
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leopoldo alas mínguez Spanish journalist and writer (1962-2008), ES (b. 1962) |
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ai-ai de las alas Filipino actor and comedian, PH (b. 1964) |
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| vello alas (b. 1908) |
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| ottomar alas tennis player (b. 1922) |
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askur alas Estonian journalist and translator, EE (b. 1973) |
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jaime alas Salvadoran footballer, SV (b. 1989) |
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