The world of Game of Thrones is dense with lore and complicated family histories, and House Stark is among the series' most important families. The Starks are regarded as one of Westeros' Great Houses and the royal family of the Northern regions, even before the age of Aegon I Targaryen's legendary conquest of the continent.
Source：https://www.cbr.com/game-of-thrones-stark-family-tree-explained/
