Svi vi koji u kuci imate Ljiljane na zidu prvo se DOBRO zabijte u literaturu pa procitajte KO JE TAJ GRB IMAO.

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Tvrtko was the firstborn child of Vladislav of Kotroman and Jelena Šubić, who were married at the Šubić's stronghold of Klis in summer-long festivities open to the whole population. Tvrtko was a scion of the two most prominent families. Tvrtko was the first cousin of Elizabeth of Kotroman, the daughter of Vladislav's brother, ban Stephen II Kotromanić, and his third wife the Polish Princess Elizabeth of Kuyavia.
In the times when the plague was devastating the region, Tvrtko's mother Jelena Šubić was in charge of the household, which, among others, included her own family, including her ailing husband Vladislav, and the family of her ailing in-laws of Stephen II Kotromanić. Jelena brought up her own children, Tvrtko, his younger brother Vuk Kotromanić, and his sister Katarina, together with her niece and adopted daughter Elizabeta Kotromanić.
In 1350, Elizabeta Kotromanić was hand-picked to become, in 1353, the second wife of the king Louis I of Hungary, king of Hungary, since 1370 of Poland, etc. In 1361, Katarina was married to Hermann I of Celje. They became parents of Hermann II of Celje and grandparents of Barbara of Cilli, Barbara Celjska, the future wife, queen and empress to the Holy Roman Emperor Sigismund of Luxemburg.
All House of Kotroman siblings, Tvrtko and Elizabeta in particular, were very close, calling themselves, even in official documents, as my beloved brother and my beloved sister, respectively. Thus, Tvrtko was, in fact, the brother-in-law, vassal and trusted ally of Louis I, and the brother-in-law of Hermann I of Celje. Tvrtko was also a descendant, on both paternal and maternal sides, from the Arpad dynasty that ruled Hungary and Croatia, and House of Nemanja, that ruled the Serbian Lands and at its peak the Greek lands. Tvrtko's paternal grandmother was Jelisaveta Nemanjic, the daughter of the Serbian nobleman Stefan Dragutin of Nemanja and his wife the Arpad Princess Katalin, the daughter of the Cuman Koteny Princess christened Elizabeth and her husband Istvan V who was the son of King Bela IV. Tvrtko's maternal great-grandmother was Ursa Nemanjic, Jelisaveta's sister.
Tvrtko's maternal uncle Mladen III Šubić was married to Jelena Nemanjić, the daughter of Stefan Decanski, from Nemanjić dynasty, and Maria Palaeologina, and a half-sister of Serbian Emperor Stefan Dušan.
Tvrtko's paternal aunt Marija was the wife of Nicolae Alexandru Basarab and the grandmother of Mircea I the Elder. Tvrtko's maternal uncle Pavao III Šubić was married to Catherina Dandolo, his maternal aunt Katarina Šubić was married to Ivan Jurišić, his grand-aunt was Elizabeta Krčka (later known as Frankopan), while his grand-uncle was Jacopo Tiepolo....itd...