Cognomen Adelka (Adelka 
) , around the world, is a very rare last name. The cognomen Adelka is characteristic of Romania, where it is a rare surname, Czechia, and the United States, where it is an extremely rare surname. More frequently, Adelka is the forename as well as the last name.
Adel, Vesela, Markova, Saskova, Moučková, Musgrave, Sullivan, Somsiová, Cizmarova, Balogova, Jaquez, Bohackova, Tarasova, Valikova, Francova, Šalenova, Beránková, Bongilajova, Kollarikova, Nováková, Škultétyová, Kucerova, Drgova, Doušová, Danova, John, Vila, Shawn, Sucha, Arias, Adell, Cinko, Cseke, Cseidi, Polak, Radun, Rybar, Niels, Nunez, Oprea, Molcan, Mejzesova, Santos, Cherry, Binova, Kanjka, Klimentová, and Gołębiowska