bought his brother out shortly after the company was founded). 9 sept. 2022 · Robert James Gronkowski: Also Known As: Rob Gronkowski: Birthday: May 14, 1989: Age : 34 years old: Sun Sign: Taurus: Traits: Positive: Creative, loyal, and generous Negative: Stubborn, materialistic, and lazy: Birthplace: Amherst, New York, USA: Currently residing: Foxborough, Massachusetts, USA: Nationality: American: Education.