In Aldfrysk foarbyld fan nomenynkorporaasje
Until the present day, the phenomenon of noun incorporation has been
demonstrated for Middle and Modern Frisian, but not yet for Old Frisian.
We have now found a clear Old Frisian example in a text in the Fivelgo
manuscript (ca. 1440). The attestation is the more compelling, since it
contains all the characteristics of Type II in Mithun’s (1984) hierarchy.