In English, owner and manager are two different things. In a small business, the owner might choose to manage the business himself, but then he would still be called the owner, not the manager. In most businesses, the owner hires someone else to run his business. So the owner is one person, and the manager is a different person. Beware of cognates. Their meaning often changes from one language to another. Here's a funny story about cognates. I told a Brazilian friend I needed a 'vaso de agua' because in Spanish, vaso means glass. Not in Portuguese! Vaso is used for a vase for flowers, and also as vaso sanitario, their word for toilet. My Brazilian friend shook her head and drew a picture of a bathroom to teach me the difference.