Tommi is of Scandinavian origin, derived from the Nordic name Þórumr, which was used by the Norse and later adapted into the Old Swedish form Tormod. The name is composed of two elements: 'þór' meaning thunder, and 'mōðr' meaning courage. Thus, Tommi translates to "courageous as Thor," referencing the Norse god associated with strength and virility. The name was popular in Sweden during the Middle Ages but has since declined in usage there. In Finland, however, it remains more common due to historical ties between the two countries. Today, Tommi is occasionally used in English-speaking countries, often as a short form of Thomas or other similar names like Tobias and Theodor.
"Tommi experienced significant fluctuations in popularity over the decades, with a peak of 47 births in both 1976 and 1977. However, it has seen a steady decline since then, reaching its lowest point recently with only 19 births in 2022."