Surname Williencourt (Williencourt 
) , all around the world, is a very rare last name. The surname Williencourt is habitual in France, where it is a rare surname, and the United Kingdom, where it is an extremely rare surname.
| VARIANT | COUNTRY |
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| Williencourt | France, United Kingdom |
| jean-loup asselin de williencourt (born 1931) (b. 1931) |
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| catherine asselin de williencourt (born 1958) (b. 1958) |
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| yves asselin de williencourt (born 1958) (b. 1958) |
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| sabine asselin de williencourt (born 1961) (b. 1961) |
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| jean-henri asselin de williencourt (born 1963) (b. 1963) |
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| jacques asselin de williencourt (born 1965) (b. 1965) |
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| domitien éd williencourt |
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Mr, François, Guillaume, Dominique, Constance, Charlotte, Thibault, Lou-Anne, Ghislain, Grégoire, Bertrand, Stephane, Mathilde, Nicolas, Anne-Sophie, Guyonne, Camille, Hubert, Hugues, Benoit, Claude, Arnaud, Alexis, Marie, Iris, Eric, Grã, Anne, Ms, Pauline, and Marie-Camille