Complex sentence: These Gurjars (Gujars or Gujjars) migrated from Arbuda mountain region and as early as sixth century CE, they set up one or more principalities in Rajasthan and Gujarat.
Split into simpler sentences: These Gurjars (Gujars or Gujjars) migrated from the Arbuda mountain region. As early as sixth century CE, they set up one or more principalities in Rajasthan and Gujarat.