This part of Germania Secunda was called the Civitas or Colonia Traiana (polity or colony of Trajan), and it was also inhabited by the Betasii.
[1][2] The variants Cugerni, used by Tacitus and in the epigraphic record, and Cuberni, attested by Pliny and a single inscription, presumably originated from different spelling traditions.
However as with the Batavi and Tungri and other tribes of the region during Roman times, the ancestry of the Cugerni was probably mixed, and may have included other tribes from the east of the Rhine, plus survivors of the Menapii or Eburones who lived in this region in the time of Caesar, when it was considered to be part of Gaul, and not yet part of the Roman Empire.
To the west of the Cugerni and Betasii were the Batavi, and to their southwest were the Tungri, along with other tribes such as the Toxandri, living in the Civitas Tungrorum.
Tribes such as the Chamavi, Chattuarii, and Sallii were eventually allowed to settle semi-independently within Germania Inferior, and were referred to as Franks.