The Open Source Definition (Annotated) The indented, italicized sections below appear as annotations to the Open Source Definition (OSD) and are not a part of the OSD. A plain version of the OSD without annotations can be found here.
Peter used the stage name Graves, a maternal family name. He used the name Graves to honor his mother's family, and also so as to not be confused with his older brother, James Arness, who was a famous actor in his own right, as the star of the television series Gunsmoke.
The theory goes that Jon is not Eddard Stark's son, but his nephew, and that his true mother is Ned's sister Lyanna. What's more, his father is Rhaegar Targaryen, the silver-haired prince who incited Robert's Rebellion by abducting Lyanna.