Surname Gillioz (Gillioz 
) , throughout the world, is a rare family name. The last name Gillioz is habitual in Switzerland, where it is quite a rare surname, France, where it is a rare surname, and Argentina, where it is a very rare surname. Measured by absolute frequency, the name is most common in Switzerland, France, and the United States. Very seldom, Gillioz is the forename as well as the last name.
| VARIANT | COUNTRY |
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| Gillioz | France, Argentina, Spain, United States, Switzerland |
| roger gillioz Swiss television director (1934-1991), CH (b. 1934) |
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| marie-bernard gillioz praz oenologist, winegrower, CH (b. 1954) |
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| laurent gillioz researcher (ORCID 0000-0001-9413-4920) |
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| valerie gillioz Swiss association football player, CH (b. 1987) |
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Mr, Betty, Karen, Kevin, Robin, Derek, David, Diana, Dylan, Laura, Loïc, Lucie, Elida, Edgar, Valã, Mareva, Michel, Sandra, Samuel, Susana, Sophie, Sylvie, Alain, Aline, Steve, Susan, Ms, Myl, Cã, Jen, Jã, Marc, Stã, Alex, Anne, Paul, Alexia, Gael, Jean, Noé, Noã, Eric, Fred, Frã, Marie, Sarah, Sacha, Simon, Luca, and Amanda