Surname Poirier-Coutansais (Poirier-Coutansais 
) , in all the world, is a very rare last name. The cognomen Poirier-Coutansais is habitual in Western Europe, particularly France, where it is a rare surname. Parts of the name also exists independently as a last name Poirier, and a last name Coutansais.
| VARIANT | COUNTRY |
|---|---|
| Poirier-Coutansais | France |
| françoise poirier-coutansais French archivist and historian, FR (b. 1926) |
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| gonzague poirier-coutansais FR (b. 1945) |
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