An example of nephew is your sister's son.
- the son of one's brother or sister
- the son of one's brother-in-law or sister-in-law
- an illegitimate son, as of a medieval prelate: a euphemism
- a descendant
Origin of nephewMiddle English neveu from Old French from Classical Latin nepos from Indo-European base an unverified form nepot-, grandson, nephew from source Sanskrit napat, Old English nefa
Origin of nephewMiddle English neveu, nepheu from Old French nevo, neveu from Latin nepōs ; see nepōt- in Indo-European roots.
From Middle English nevew, neveu (“nephew, grandson"), from Old French neveu (“nephew, grandson"), from Latin nepÅtem, accusative of nepÅs (“nephew, grandson"), from Proto-Indo-European *nepot- (“grandchild, sister's son"). Cognate with Old English nefa (“nephew, grandson"). More at neve.