Surname Ilagan (Ilagan 
) , around the globe, is a common last name. The cognomen Ilagan is characteristic of Philippines, where it is quite a common surname, United Arab Emirates, and Qatar, where it is quite a rare surname. Not in comparison with a country's population, this name is the most popular in Philippines, United Arab Emirates, and the United States.
| hermogenes ilagan Filipino theater actor, writer and director, PH (b. 1873) |
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rizalina ilagan Filipino anti-martial law activist, PH (b. 1954) |
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luzviminda ilagan Filipino politician, PH |
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| liberty ilagan actor, PH (b. 1943) |
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| jay ilagan Filipino actor, PH (b. 1953) |
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| mon ilagan Mayor of Cainta, Rizal, Philippines, PH (b. 1960) |
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| avic ilagan Filipino actress, PH (b. 1961) |
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| kenneth ilagan Filipino guitarist, PH (b. 1971) |
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| lourence ilagan Filipino darts player, PH (b. 1978) |
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| gabrielle s ilagan researcher |
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| bernard j ilagan researcher |
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| francisco ilagan researcher (ORCID 0000-0002-5430-673X) |
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| rk ilagan Filipino basketball player (b. 1997) |
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