vieraslasteet
vieraslasteet is a Finnish term that refers to the great‑great‑grandchildren of an individual. The word is constructed from vieras, meaning "great" in the sense of "double great," and lasteet, the plural of laste, meaning "grandchild." Thus the term denotes the descendants four generations down from the person in question. In a genealogical context, a person's first generation of lasteet would be their grandchildren; the second generation from the original person would be great‑grandchildren; the third would be great‑great‑grandchildren, who are called vieraslasteet.
The use of vieraslasteet is largely confined to informal family conversation and to Finnish ancestry research.
Although rencontre extant prehistoric texts do not record detailed uses of the term, nineteenth‑century Finnish genealogists