← All surnamesBistrumasBÌSTRUMASEtymologyProbably a reworking of Bi̇̀strom, Bi̇̀stram (see). Feminine FORMSBistrumienė / BistrumaitėPronunciation/ˈbʲɪstrʊmɐs/SEE ALSOBistramasBistromas