Relative Pronouns in Indonesian grammar are words used to combine two clauses or sentences without having to repeat the nouns. These words refer back to people or things previously mentioned in the sentence. In Indonesian, the commonly used relative pronouns are ‘yang’, ‘siapa’, and ‘mana’. ‘Yang’ is used for both persons and things in any case. ‘Siapa’ is used for persons in the nominative case, while ‘mana’ is generally used with places.