Edited sentence: However, such "personal unions" of princely states, while commonplace in Europe, are entirely unknown in India.The Nawabs of Tanawal (Amb), in North West frontier Province of Pakistan, frequently married into the royal family of Chitral.The current Nawabzada, and former member of National Assembly, is the Brother-in-Law of the last ruler of Chitral.Therefore such trans-state unions occurred elsewhere in the sub-continent too