All around the world, Sadej (Sadej 
, เสด็จ , Садей 
) is a rare epicene forename. The forename Sadej is characteristic of Thailand, where it is a rare mostly masculine, but infrequently female name, and India, where it is an extremely rare unisex name. Very seldom, Sadej is the last name as well as the forename.
Jan, Srinaul, Andrzej, Barbara, Dariusz, Jadwiga, Tadeusz, Thamdee, Vitrano, Miroslaw, Sangkaew, Krystyna, Genowefa, Elzbieta, Zbigniew, Stanislaw, Chaichana, Katarzyna, Kazimierz, Krzysztof, Helena, Wladyslaw, Henryk, Janina, Ewa, Anna, Adam, Jzef, Maria, Marta, Roman, Jacek, Irena, Iwona, Zofia, Marian, Alicja, Antoni, Khatun, Robert, Renata, Lehpamer, Lucyna, Teresa, and Franciszek