Which ethnic groups entered southeastern Ghana from the east and southeast?

The ethnic groups that entered southeastern Ghana from the east and southeast are the Ewe and the Ga-Adangme.1

These groups are believed to have migrated into the region within the last 700 to 1,000 years. Historical traditions indicate that the founders of these states began arriving from the direction of present-day Nigeria via a southerly route. While these migrations are often characterized as mass movements, it is understood that the arriving populations encountered and absorbed earlier inhabitants of the area.123