Ethnic divisions often correspond to geography, which is also widely varied.
Some have said the 4 arms of cross are four seasons, where the division for 90-degree sections correspond to the solstices and equinoxes.
Roughly the division corresponded to the family lines of the current chieftain of that clan having sons.
The western division corresponded to the Liberty of Saint Edmund.
It cannot be assumed that an archaeological division corresponds to a particular language group or to a political entity such as a tribe.
The locational division corresponds pretty well with a manufacturing-service distinction.
It also seems obvious that the political division of the European sky no longer corresponds to the technical requirements and market requirements.
However, in many cases, these divisions correspond to earlier, pre-Norman, divisions.
The division of schools corresponds very closely to the old pre-Roman distribution of the region into three sections.
The religious and ethnic divisions corresponded to social stratification.