Family name Martynas (Martynas 
, Марцін 
, Мартинас 
) , throughout the world, is a rare last name. The cognomen Martynas is characteristic of Lithuania, where it is quite a rare surname, Ukraine, where it is a rare surname, and Romania. Much more frequently, Martynas is the forename as well as the last name.
As, Navickas, Nesvarbu, Ivanovas, Adomaitis, Petraitis, Lapinskas, Jankauskas, Vitkauskas, Kazlauskas, Paulauskas, Petrauskas, Giedraitis, Jokubauskas, Malinauskas, Mickevicius, Mikalauskas, Sabaliauskas, Baranauskas, Kavaliauskas, Petkevicius, Ramanauskas, Gedminas, Stankevičius, Papartynas, Bagdonas, Ys, Nas, Ius, Gecas, Mockus, Mickus, Simkus, Stukas, Butkus, Kairys, Pocius, Rimkus, Dauksa, Jankus, Juodis, Stankus, Stonkus, Bartkus, Ramonas, Venckus, Savickas, Buivydas, and Vasiliauskas