köken: Inherited from Old Polish bratanek. By surface analysis, brat + -anek. Sense 2 is in reference to Polak, Węgier, dwa bratanki, i do szabli, i do szklanki.
köken: Inherited from Old Hindi भतीजा (bhatījā), from Prakrit भत्तिज्ज (bhattijja), from Sanskrit भ्रात्रीय (bhrātrī́ya), भ्रात्रेय (bhrātreya, “fraternal”), from भ्रातृ (bhrātṛ, “brother”), the source of Hindi भाई (bhāī) and भ्राता (bhrātā). Cognate with Gujarati ભત્રીજો (bhatrījo).