Cognomen Whillans (Whillans 
) , throughout the world, is a rare surname. The last name Whillans is habitual in Isle of Man, where it is quite a rare surname, Canada, where it is a rare surname, and Australia. In absolute terms, the name is most common in Canada, the United Kingdom, and Australia.
| VARIANT | COUNTRY |
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| Whillans | United Kingdom, Australia, United States, Canada, Isle of Man |
| ken whillans Canadian politician, CA (b. 1927) |
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| donald desbrow whillans English mountain climber, GB (b. 1933) |
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| ian whillans American glaciologist (b. 1944) |
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| jennifer whillans researcher |
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| ashley whillans behavioural scientist, CA (b. 1988) |
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| shona whillans badminton player, GB (b. 1998) |
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