Tommi is of Scandinavian origin, derived from the Old Norse 'Thór-mann', which means 'follower of Thor'. It's a variant spelling of the more common Thomas, also of Scandinavian descent. Tommi is often used as an independent given name, but can also serve as a diminutive for other names like Thomas or Tobias.
The name Tommi had a notable gap in popularity between 1985 and 1989, with no recorded births in those years. It reemerged in 1991 with five births, bringing the total number of babies named Tommi over these three years to sixteen.