Cognomen Rupeika (Rupeika 
) , worldwide, is a rare family name. The cognomen Rupeika is characteristic of Northern Europe, particularly Lithuania, where it is quite a rare surname, Latvia, and Estonia, where it is a rare surname. In absolute terms, it is the most numerous in Lithuania, Latvia, and the United States.
| VARIANT | COUNTRY |
|---|---|
| Rupeika | Brazil, United States, Latvia, United Kingdom, Lithuania |
| benediktas vilmantas rupeika Signed the Act of the Re-Establishment of the State of Lithuania, LT (b. 1944) |
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Mr, Vacys, Ignas, Zaiga, Marisa, Mantas, Arunas, Agnija, Kęstutis, Dangis, Darius, Leonas, Joseph, Josefa, Justas, Edward, Vytenis, Michael, Sarunas, Stanley, Antonio, Cynthia, Helen, Tomas, Thais, Jonas, Ms, Jim, Aiga, Jose, John, Ilze, Ieva, Matas, Aldas, Pedro, Brendan, Romas, Diana, Diane, Greta, Lelde, Linda, Linas, Lukas, James, José, Josã, Riäardas, and Dovilas