|Place of origin:||Earth|
|First mentioned in:||Good Companions|
William Haybourne was the husband of Tegan Jovanka.
William was a professor in Exeter. He was later appointed to the new chair at St. Cedd's, and he and Tegan moved to Cambridge. One day while giving a lecture, he fell ill and was taken to the General Hospital. He died some time after. (PROSE: Good Companions)