Wilhelm Tell (in English William Tell) was an archer from the 13th and 14th century who lived in central Switzerland. He once instructed the Doctor in archery. After successfully using a Sevateem crossbow to sever a length of rope, the Fourth Doctor credited the Swiss for his skill, and added that Tell was a "charming man." (TV: The Face of Evil)
The Seventh Doctor once told his companion Ace that he had met Tell, though she believed that he may have been joking. (AUDIO: The Settling)
Gioachino Rossini's William Tell Overture has named after him. (AUDIO: Enemy Aliens)