Stele of Sulaiman

How does a descendant of Genghis Khan end up with the name of Suleiman (Solomon)?

The stele itself is just one feature of an entire complex of caves, buildings, and artifacts dating back to ~ 400 CE (although largely ~ 1100 ish).

eg: The Library Cave, aka Cave 17, a trove of offline document c̶l̶o̶u̶d̶ cave storage.

https://en.wikipedia.org/wiki/Mogao_Caves