Analysis of information sources in references of the Wikipedia article "Osman I" in Indonesian language version.
Informasi yang dapat dipercaya mengenai Osman sangat langka. Tanggal lahirnya tidak diketahui dan signifikansi simbolisnya sebagai bapak dinasti telah mendorong perkembangan cerita mitis mengenai kehidupan dan asal usul penguasa; namun, para sejarawan setuju bahwa sebelum tahun 1300, Osman hanyalah salah satu di antara sejumlah pemimpin suku Turkoman yang beroperasi di wilayah Sakarya.
By the time of Osman's death (1323 or 1324)...
There is still not one authentic written document known from the time of ʿOsmān, and there are not many from the fourteenth century altogether.
Beyond the likelihood that the first Ottoman sultan was a historical figure, a Turcoman Muslim marcher-lord of the Byzantine frontier in north-west Anatolia whose father may have been called Ertuğrul, there is little other biographical information about Osman.
The attraction of Aşıkpasazade's story was not only that it furnished an episode proving that God had bestowed rulership on the Ottomans, but also that it provided, side by side with the physical descent from Oguz Khan, a spiritual descent. [...] Hence the physical union of Osman with a saint's daughter gave the dynasty a spiritual legitimacy and became, after the 1480s, an integral feature of dynastic mythology.
First communicated in this form in the later fifteenth century, a century and a half after Osman's death in about 1323, this dream became one of the most resilient founding myths of the empire.