In 1399, after 15 years on the throne, Queen Jadwiga of Poland gave birth to a daughter named Elizabeth Bonifacia with her husband Jogaila, Grand Duke of Lithuania. However sickly baby died aged 3 weeks alongside her mother 4 days later. Her husband Jogaila became solo ruler and ruled for next 34 years until he died leaving his 10-year-old son King. However, I would want to know what if Elizabeth Bonifacia survived with Queen Jadwiga still dying in this timeline. Who would she marry? Would she become Queen of Hungary from the claim of her mother? What would her descendants rule over? How would history of Europe change?