Use of the Relative Pronouns Relative pronouns introduce describing clauses. They are categorized into those used for people (who, whom, and whose) and those used for things (which and that). ! People pronouns are either subjective or objective and either restrictive or non‐restrictive, and thing pronouns are either restrictive or non‐restrictive.   As a general rule, who is used for persons only. It may refer to a Singular or a Plural Noun. The man who is honest is trusted. Blessed is he who has found his work. He ...