Jon Snow, played by Kit Harrington, is actually a Targaryen prince and the nephew of Daenerys Targaryen. … While Aerys reigned, his son, Rhaegar Targaryen, was married to Elia Martell, sister of Oberyn Martell (the guy whose head was smashed by The Mountain).
How are Jon Snow and Daenerys Targaryen related?
As the two get together for the first time, however, fans are given the full confirmation of a longstanding theory and something that got pretty much confirmed earlier, which is that Jon Snow is actually Aegon Targaryen. The R+L = J theory came to be, meaning that Jon Snow was the blood nephew of Daenerys.
Is Jon Snow immune to fire?
No,Jon Snow is not immune to fire. In season 1, episode 8 he fought with a wight to protect Lord Commander Mormont. He threw a burning lamp at the wight and in the process,his hands was burned with fire.