Are there any subgroups within the Navajo?

There were not really subgroups in the historic or present Navajo people. At least not the way that the Lakota had 7 bands such as Hunkpapa or Oglala. Nor was it like the way Scottish clans ruled various territories. The Navajo have about 84 clans placed in 21 relationship groups. All are supposed to have come from the four original clans. However, because it is considered very wrong to marry anyone in any of the four clans of your grandparents, the clans are always getting mixed up over time. For traditional people, one should not even date or go to a dance with someone in one of the four clans of your grandparents. Certain clans are more common in different areas but they don't constitute subgroups.