noun Date: 1824 a syntactic construction in English in which possession is marked both by the preposition of and a noun or pronoun in the possessive case (as in “A friend of Bob's is a friend of mine”)
DOUBLE GENITIVE
Meaning of DOUBLE GENITIVE in English
Merriam Webster. Explanatory English dictionary Merriam Webster. Толковый словарь английского языка Мерриам-Уэбстер. 2012