This last area,Tapapanuwa, seems located near the Dahara river, which was the current Devrez Cay.
An unknown Greek geographer, evoking a river between Billæos and Parthenius, writing "River Psilis, today known with the name of Papanios". Some coastal rivers originate close to that of the Devrez Cay.
Strabo is more accurate about the area called Babanome, Babanomon or Babanomitis: "The Diacopène and Pimolisène extended to the Halys retaining all the same appearance of wealth and fertility. These two cantons form the northern part of the territory of Amasia and measure length of 500 stages. The other cantons following (of the Pontus territory) are the Babanome and Ximène, which itself reached the banks of the Halys, are measured in the same sense a much greater, and the whole represents the length of the territory of Amasia."
However, in this description of Strabo, only the Ximène is along the Halys: the Babanome seems the farthest west, towards the upper valley of the Devrez Cay.
During 1500 years we must admit that the memory of the country of Tapapinuwa was retained with a pronunciation that is slightly deformed over time. However, the last two millennia have erased all traces of this country.
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My notes of veracity :
The country of Tapapinuwa was the classical Babanome: 4/5