If the player character's spouse belongs to the same dynasty, (s)he also has this icon
Siblings and half-siblings, parents, children, grandparents, grandchildren, uncles and aunts, nephews and nieces. The player character's immediate successor to their primary title. The current character controlled by the player The icon above a character's portrait designates their level of kinship toward the player character: The dynasty is key to character succession, in which a player controls a sequence of rulers of the same dynasty rather than merely a noble title. Thus, it is the most important aspect of the game.
In Crusader Kings II, the playthrough revolves around the survival and growth of the player's dynasty. A dynasty is a set of characters considered as members of the same family.