Onassis is a masculine name with Greek origins. It is pronounced as oh-NAH-sis (/oʊˈnɑːsɪs/). This unique name has a strong and distinguished sound to it. While it may not be very common, it carries an air of sophistication and strength. The name Onassis is associated with the famous Greek shipping magnate, Aristotle Onassis, who was known for his business ventures and glamorous lifestyle. Although not widely used in recent years, the name Onassis has appeared on the birth records in the United States in previous decades, peaking in popularity during the 1980s and 1990s. It is worth considering for parents who are looking for a distinctive and powerful name for their baby boy.