Where does “dvergbjerk” come from?

dvergbjerk (Norwegian Bokmål) comes from Norwegian Bokmål bjerk, from Old Norse bjǫrk, from Proto-Germanic birkijǭ, from Proto-Indo-European bʰerHǵos — birch.

dvergbjerk (Norwegian Bokmål): dwarf birch

Definitions

dwarf birch

Ancestry of “dvergbjerk”, step by step

dvergbjerk traces back through two separate lines of ancestry.

via Norwegian Bokmål bjerk

Step	Language	Word	Meaning
1	Norwegian Bokmål	bjerk	a birch; birch
2	Old Norse	bjǫrk	birch, birch tree
3	Proto-Germanic	birkijǭ	birch
4	Proto-Indo-European	bʰerHǵos	birch

via Norwegian Bokmål dverg

Step	Language	Word	Meaning
1	Norwegian Bokmål	dverg	a dwarf
2	Old Norse	dvergr	a dwarf; a short support pillar; a brooch, stud,...
3	Proto-Germanic	dwergaz	dwarf

Every word from Proto-Indo-European bʰerHǵos →Every word from Proto-Germanic birkijǭ →Every word from Old Norse bjǫrk →