Proto-Turkic: *bEr-
Meaning: 1 southern, right 2 to the South, to the right
Russian meaning: 1 южный, правый 2 к югу, направо
Old Turkic: ber-din 1 (Orkh., OUygh.), beri-je 2, ber-gärü 2 (Orkh.)
Comments: EDT 359,364, 370. The forms ber-din (abl.), ber-ije (adv.), ber-gerü (dir.) - from a spatial noun *ber. The usually related berü 'this side, here' etc. (EDT 355, ЭСТЯ II 124-125) should be rather kept apart. It is unclear morphologically (bērü < ber-rü seems to be a unique development) and may be derived from the demonstrative bu 'this', just like naru, aŋaru, onaru 'that side, there' is derived from the demonstrative stem an- 'that' (see Brockelmann 1954, 134).
