stepgrandchild

Noun

 * 1) The stepchild of one's own child.
 * 2) The grandchild of one's wife or husband by a previous partner, or the child of one's stepchild.
 * 1) The grandchild of one's wife or husband by a previous partner, or the child of one's stepchild.

Translations

 * German: Stiefenkelkind, Stiefenkel
 * Spanish: nieto político, proyerno
 * Swedish: styvbarnbarn