September is Etymology Month (1)

БОБР [bobr] 'beaver' (cf. бобёр 'beaver fur') From CSl. *bobrъ/*bebrъ, IE *bhebros 'red-brown, beaver' (cf. Lith. bebras 'beaver'), the animal thus being named for the colour of its fur.

[All etymologies this month taken from Terence Wade's useful Russian Etymological Dictionary (London, Bristol Classical Press 1996)]