niiden

Pronoun

 * 1) their; used without possessive suffix in the main word owned.
 * Niiden äiti on 45-vuotias.
 * Their mother is 45 years old.
 * 1) theirs that which belongs to them, used without a following noun
 * Tämä kirja on niiden.
 * This book is theirs.
 * 1) they; used with monopersonal verbs which require genitive such as pitää, täytyä, tulla, olla + passive present participle etc.
 * Niiden pitää/täytyy/tulee tehdä / on tehtävä tämä nyt.
 * They have to do this now.
 * 1)  their, theirs; used instead of
 * 1)  their, theirs; used instead of