Яр [(udm.) yar] ʻA steep bank of a river (ravine, hill)’. It is possible that the appellative was borrowed from Russian яр [yar] ‘steep coast; a large deep ravine; sheer cliff; crevice shore’ or Turkic яр [yar] (the same).
According to Fasmer’s opinion, this Russian appellative is borrowed from the Turkic languages. But there is a doubt since there are no cliffs or steep river banks in this area.
The first mention about Yar is fixed in the lists of settlements of the Ukanskaya volost [county] of the Glazovsky district of the Vyatka province, 1836. [Atamanov 2015: 950].