Cognomen Vadnais (Vadnais 
) , in all the world, is quite a rare surname. The cognomen Vadnais is habitual in Canada, where it is quite a rare surname, the United States, where it is a rare surname, and New Zealand.
| VARIANT | COUNTRY |
|---|---|
| Vadnais | Canada, France, New Zealand, United States, Ireland |
|
carol vadnais Canadian ice hockey defenceman (1945-2014), CA (b. 1945) |
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| caroline vadnais researcher |
|
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| christiane vadnais Quebec poet and short story writer, CA (b. 1986) |
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