- "Autumn and winter will pass, but, come spring, the first full moon after Sigr Blot, we will gather for business at the beach. Sverri will be there, I swear."
- —Jonis to Ragnar and Steapa about Uhtred's whereabouts
Jonis was a minor character in The Last Kingdom television series. He was a slave-trader, who frequently sells to Sverri.
Northumbria; Uhtred and Halig are sold as slaves to Jonis by Guthred. He then gives them off to Sverri. ("Episode 2.2")
Jonis is approached by Ragnar, who demands to know where Uhtred is. Jonis tells him that he sold him off to Sverri, and that they will return come spring. ("Episode 2.3")
Later, Sven visits Jonis and also asks him of Uhtred's whereabouts. It is assumed that Sven kills him, as he is not seen again. ("Episode 2.3")