<P> A matryoshka doll (Russian: матрёшка, IPA: (mɐˈtrjɵʂkə) (listen)), also known as a Russian nesting doll, stacking dolls, or Russian doll, is a set of wooden dolls of decreasing size placed one inside another . The name "matryoshka" (матрёшка), literally "little matron", is a diminutive form of Russian female first name "Matryona" (Матрёна) or "Matriosha". </P> <P> A set of matryoshkas consists of a wooden figure which separates, top from bottom, to reveal a smaller figure of the same sort inside, which has, in turn, another figure inside of it, and so on . </P>

What is the name of the dolls that fit inside each other