Wikipedia
Palnatoke or Palnatoki, sometimes written Palna-Toki or Palna Toki ( Old Norse Pálnatóki or Pálna-Tóki), was a legendary Danish hero and chieftain of the island of Fyn. According to the Jómsvíkinga saga, Palnatoki founded the brotherhood of Jomsvikings and established its laws, although many doubt this.
According to the Jómsvíkinga saga, he was the son of Palner Tokesen and his wife Ingeborg who was the daughter of the Geatish earl Ottar Jarl. Palnatoke raised king Harald Bluetooth's son Sweyn Forkbeard and was a staunch supporter of the old pagan faith. Harald Bluetooth had allowed Christian missionaries from the Archbishop of Hamburg-Bremen missionary in Denmark and the king himself was baptized once between 960 and 965. Palnatoke convinced Sweyn to wage war on his father. In the mid-980s, Sweyn revolted against his father and seized the throne. Harald was driven into exile and died shortly afterwards. According to some accounts, Palnatoki himself slew Harald. In addition to religious motives, he may have been taking revenge for the death of his grandfather, Jarl Ottar, who was killed when Harald invaded Götaland.
Saxo Grammaticus relates how Palnatoke (Toko) was forced by King Harald to use a single arrow to shoot an apple from his own son's head as the boy ran downhill. The legendary motif of the great archer forced to shoot an apple from his son's head appears among other Germanic nations, as the story of Egil in the Þiðrekssaga, William of Cloudesley in an English ballad, Hemming Wolf in Holstein, Puncher in an Upper Rhenish legend in Malleus Maleficarum, and most famously William Tell in Switzerland.
The name has been interpreted in two different ways. The first is as an alternate Old Norse patronymic meaning "Palni's (or Palnir's) (son) Tóki". The other is as a nickname meaning "Shaft-Toki" or "Toki the Archer".