Osman I, also known as Osman Ghazi, was the founder of the Ottoman dynasty and the ruler of the Kayi tribe, a key figure in the creation of one of history's most influential empires. The state he established, originally called the Ottoman Beylik or Emirate, grew from a small Turkmen principality in the late thirteenth century into a global power, dominating much of Southeastern Europe, Western Asia, and North Africa for centuries. While the empire he founded lasted until the end of World War I, the man himself remains shrouded in mystery.

Due to the scarcity of historical records from Osman's lifetime, much of what is known about him is based on oral traditions and legends that developed long after his death. There are no known contemporary written sources from his reign, and the Ottomans themselves did not document his life until the fifteenth century, over a hundred years after he passed away. This gap in documentation has made it difficult for historians to separate fact from fiction, with some scholars even describing the period of Osman's life as a "black hole" of historical knowledge, unable to be reconstructed with certainty.

The traditional accounts of Osman's ancestry trace his lineage to the Oghuz Turks, specifically the Kay tribe. However, many historians believe that the stories surrounding his ancestry were fabricated later to legitimize the Ottoman dynasty's rule. These narratives were likely developed as the dynasty sought to strengthen its claim to power and emphasize its noble heritage.