Teis / Matthias / Matthæus / Mathias / Matias

Teis is a Danish and Frisian diminutive of the name Matthias or Matthæus, which ultimately derives from the Greek name Mattathias. The Greek name, in turn, comes from the Hebrew name Mattityahu, meaning 'gift of Yahweh' or 'gift of God'. The name has a long history of use, particularly in Christian traditions due to its association with the Apostle Matthew.

While Teis is a relatively short and modern-sounding name, its roots are ancient and deeply religious. It gained popularity in Denmark and the Frisian regions as a familiar form of the longer, more formal biblical names. Its simplicity and clear meaning have contributed to its continued, albeit regional, usage.