wiens

Etymology
Genitive masculine singular of.

Determiner

 * 1)  whose
 * 2)  whose
 * 1)  whose

Usage notes
Wiens has come to replace its female equivalent,, in both singular and plural. While wiens is the genitive masculine singular of wie, wier is the genitive feminine singular and the genitive plural. Although the use of wier has become largely archaic and dialectal, it is still recommended by grammarians. Example sentences of different usage:
 * Hij is de enige president wiens moedertaal niet het Engels was. &mdash; He is the only president whose mother tongue was not English. (genitive masculine singular)
 * Zij is de enige presidente wier moedertaal niet het Engels was. &mdash; She is the only president whose mother tongue was not English. (genitive feminine singular)
 * Zij zijn de enige presidenten wier moedertaal niet het Engels was. &mdash; They are the only presidents whose mother tongue was not English. (genitive plural)