Surname Romualdas (Romualdas 
, Ромуальдас 
, Ромуалдас 
) , around the world, is a very rare cognomen. The family name Romualdas is habitual in Lithuania, where it is quite a rare surname, Spain, where it is a very rare surname, and Israel. Much more frequently, Romualdas is the forename as well as the last name.
| VARIANT | COUNTRY |
|---|---|
| Romualdas | United Kingdom, Spain, Ireland, United States, Lithuania |
| Ромуальдас | Ukraine, Kazakhstan, Russia, Lithuania |
| Ромуалдас | Kazakhstan, Russia, Ukraine, Belarus |
| Рамуальдас | Kazakhstan, Russia |
As, Videika, Veimeris, Inčirauskas, Urbonas, Sateikis, Saunoris, Savickas, Stanenas, Stanulis, Lukosius, Adomaitis, Barauskas, Kaminskas, Jankauskas, Zukauskas, Zvingilas, Paulauskas, Petrauskas, Mickevicius, Sakalauskas, Petkevicius, Vaickus, Vaitkus, Jonikas, Jarocenko, Nas, Ius, Rudys, Rukas, Nakas, Mickus, Stonys, Budrys, Bucius, Bublys, Stankevicius, Pocius, Vitkus, Matonis, Survila, Sebeika, Bartkus, Radvila, Rapalas, Degutis, Daksevicius, Dulskis, Plukas, and Bartkevicius