Around the world, Klais (Klais 
) is an extremely rare girly first name. Much more prevalently, Klais is the last name as well as the forename.
Mr, Igor, Olga, Uudo, Maria, Marko, Madge, Molly, Susan, Sueli, Alice, Aline, Andre, Adair, Caleb, Celso, Clara, Becky, Brian, Brett, Bruno, Bruna, Iria, Kalev, Hans, Emma, Ms, Ana, Eva, Odo, Alan, Arno, Chad, Kane, Rita, Dawn, Giba, Glen, Leao, Levi, Jane, Jose, John, June, Todd, Timo, Essa, Egon, and Kevin