Tassilo as a Baby Name. Meaning and Origin of Tassilo

What is the meaning of the name Tassilo ?

The baby name Tassilo is a Male name , 3 syllables long and is pronounced TAS-see-loh (IPA: /ˈtasɪlo/).

Tassilo is Germanic in Origin.

Tassilo is a Germanic masculine name most closely associated with Bavaria. It comes from Old High German Tazzo/Tasso plus the diminutive suffix -ilo, a common early-medieval formation. The exact root is debated: some link Tas-/Taz- to the Germanic element dag/tag “day” (seen in Tagino), while others treat it as a short form of Diet- compounds meaning “people, nation.” Because of this, a cautious gloss is “little Tazzo/Tasso,” rather than a fixed semantic translation.

The name is strongly tied to the Agilolfing dukes of Bavaria, above all Duke Tassilo III (8th century), which anchored its use in southern German and Austrian tradition. It experienced a modest revival in the 19th-century Romantic era and today remains uncommon but recognizable in German-speaking countries. Variants include Tasilo (a preferred modern spelling in Germany), Thassilo/Thasilo (older spellings), and the related short forms Tasso/Tazzo; a rare feminine counterpart is Tassila.