Family name Troiano (Troiano 
) , in all the world, is quite a common last name. The cognomen Troiano is characteristic of Italy, where it is quite a rare surname, Argentina, and Belgium. Measured by absolute frequency, this name is the most popular in Italy, the United States, and Argentina. Very seldom, Troiano is the forename as well as the last name.
| troiano caracciolo Italian noble and condottiere, IT (b. 1410) |
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| troiano caracciolo, i principe di melfi Italian noble and military, IT (b. 1450) |
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| troiano mormile (b. 1449) |
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| troiano cavaniglia (b. 1479) |
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massimo troiano Italian composer, IT (b. 1600) |
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| troiano bozzuto Roman Catholic bishop (b. 1558) |
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troiano acquaviva d'aragona Italian cardinal, IT (b. 1696) |
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| troiano caracciolo del sole Roman Catholic bishop (1685-1764) (b. 1685) |
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| troiano spinelli (1712-1777), IT (b. 1712) |
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| troiano odazi Italian economist, IT (b. 1741) |
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| troiano marulli IT (b. 1759) |
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| troiano marulli IT (b. 1774) |
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| troiano de filippis delfico Italian politician and mayor, IT (b. 1821) |
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ernesto troiano Italian politician, IT (b. 1885) |
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| paolo raffaele troiano Italian philosopher, IT (b. 1863) |
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