(in Russian chronicles "Арские князья") was a formation of Noqrat Tatars
' nobility, served to Muscovy
in 16th-17th century. In 14th-15th centuries they were rulers of semi-independent duchy in the middle Cheptsa
, nowadays Udmurtia
. at the first time, their lands were under Kazan Khanate
's and later under Russian influence. Begs also participated in wars for Udmurtia between Kazan and Muscovy.