'Ông ấy' is a personal pronoun used in Vietnamese language to refer to a third person male, often an elderly man. It is usually used to refer to someone who is not directly involved in the conversation. The pronoun 'ông ấy' can be equated to 'he' in English when referring to an older man. It is polite and respectful, often used when talking about someone who is older or in a higher social position.