You thought the House Targaryen lineage was complicated? You haven't seen anything until you check out this family tree, which combines every single House from A Song of Ice and Fire, from the Arryns to the Westerlings, in one immense graphic. All hail El-Daddy for making it!
It includes all the family details from the recently released The World of Ice and Fire, too, but I don't think there are any spoilers in here. You can get a sense of its immense scale in the image above, but click here to see it in all its glory!