Antoniu is a given name and a surname. Notable people with this name include the following:

• Antoniu Buci (born 1990), Romanian weightlifter
• Antoniu Vasile (born 1942), Romanian boxer

• Costache Antoniu (1900–1979), Romanian actor
• Kristaq Antoniu, also known as Cristache Antoniu, (1907 – 1979), Romanian singer and actor

• All pages with titles beginning with Antoniu
• All pages with titles containing Antoniu
• Antoni
• Antonia
• Antonic
• Antonie
• Antonik
• Antonin
• Antonio
• Antonis
• Antonius