Хлеб (Khleb) is a common Slavic word used by eastern and western Slavs. Russians, Belarusians, Poles baked rye bread.  It takes 2 days and 6 stages to bake on Sweet Flag plant (Latin name: Acorus calamus)  leaf in oven one of the better known breads in Belarus. In Belarusian culture bread making was a ritual without exaggeration. Bread making equipment and recipes were passed from grandmothers to granddaughters.

Kruh sounds so Germanic.   Rye was grown in north-eastern Europe because it was yielding better crops than wheat.

Belarusian rye bread