Originally possibly Vulgar Latin, from Latinextra, whence the synonymous Romanianstră-,[1] regularly reflected in the archaic form shtër-. The modern form in s- might have arose by influence of Proto-Slavic*stàrъ(“old”), especially given sense 3, which is indeed also attested in Romanian, as for example in stră-bunic(“great-grandfather”), but not in other Romance cognates.