Cognomen Quillan (Quillan 
) , all around the world, is quite a rare last name. The cognomen Quillan is characteristic of Ireland, where it is quite a rare surname, Philippines, where it is a rare surname, and the United Kingdom. In absolute terms, it is commonest in Philippines, the United States, and Ireland. Much less frequently, Quillan is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Quillan | United Kingdom, Canada, United States, Philippines, Ireland |
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eddie quillan actor (1907-1990), US (b. 1907) |
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| marie quillan American actress (b. 1909) |
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quillan roberts Canadian soccer player, CA (b. 1994) |
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| fred quillan American football player (1956-2016), US (b. 1956) |
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| gary quillan chess player (b. 1970) |
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| quillan isidore British BMX rider, GB (b. 1996) |
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