Family name Glais (Glais 
, Glaís) , in the world, is a rare surname. The surname Glais is habitual in France, where it is quite a rare surname, Chile, where it is an extremely rare surname, and Venezuela. In absolute terms, it is the most numerous in France, India, and the United Kingdom. Much less frequently, Glais is the forename as well as the last name.
| olivier glais-bizoin French politician, FR (b. 1743) |
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| bernard glais French cyclist, FR (b. 1938) |
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| michel glais (b. 1944) |
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| dafydd ap maredudd glais Welsh cleric, murderer, civic official and translator |
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| estelle glais researcher ORCID ID = 0000-0003-3728-0942 |
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| arthur glais researcher ORCID ID = 0000-0002-7870-3836 (b. 1989) |
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