Radvilas

Compound surname. Cf. lit. Rad-vilà, Rad-vylà, Rad-vil-ãvičius, Radz-i-vilas, Radz-i-vil-ãvičius, Radz-vilà, Radz-vi̇̀las, Radz-vil-ãvičius, Radž-i-vilas, Radž-vilà, Radž-vi̇̀las (see), Latv. Rad-vils ¹. It is believed that the first word rad- may come from lit. ràsti (found) or the like. ². Cf. common Lithuanian words radvilà, rādvilas „rastinis vaikas, rastinukas, pamestinukas“ (LKŽ XI 14). For vil- see Vi̇̀lbut.