Is there any relation between Czechs and the Chech region in the Rhodopes?
The Czechs come from a forefather Čech....
Slavic tribe of Czechs ("Čech", pl. "Češi"
http://en.wikipedia.org/wiki/CzechsHistory
The Czechs are descended from ancient Slavic tribes, with significant Celtic and Germanic admixtures. The Slavic tribes have inhabited the regions of Bohemia, Moravia and Silesia since the 6th century. According to a popular myth, the Czechs come from a certain Forefather Čech who settled at Říp Mountain. In 880
http://en.wikipedia.org/wiki/Czech_LanguageName
The name "čeština", Czech, is derived from a Slavic tribe of Czechs ("Čech", pl. "Češi") that inhabited Central Bohemia and united neighbouring Slavic tribes under the reign of the Přemyslid dynasty ("Přemyslovci"). According to a legend, it is derived from the Forefather Čech, who brought the tribe of Czechs into its land.