Where does “nynorsk” come from?

nynorsk (Norwegian Bokmål) comes from Norwegian Bokmål norsk, from Middle Norwegian nornskr, from Old Norse norrǿnn, from Old Norse norðrǿnn, from Proto-Germanic nurþrōnijaz, from Proto-Germanic nurþraz, from Proto-Indo-European *nér — below the surface, below.

nynorsk (Norwegian Bokmål): Nynorsk

Definitions

Nynorsk

Ancestry of “nynorsk”, step by step

nynorsk traces back through two separate lines of ancestry.

via Norwegian Bokmål norsk

Step	Language	Word	Meaning
1	Norwegian Bokmål	norsk	Norwegian
2	Middle Norwegian	nornskr	Norwegian
3	Old Norse	norrǿnn	northern
4	Old Norse	norðrǿnn	northern
5	Proto-Germanic	nurþrōnijaz	northern
6	Proto-Germanic	nurþraz	north, northern
7	Proto-Indo-European	*nér	below the surface, below

via Norwegian Bokmål ny

Step	Language	Word	Meaning
1	Norwegian Bokmål	ny	new
2	Old Norse	Nýr	name of a dwarf
3	Proto-Germanic	*niwjaz	—
4	Proto-Indo-European	néwyos	Alternative form of *néwos; new
5	Proto-Indo-European	néwos	new
6	Proto-Indo-European	new-	new; to nod, assent to

Words derived from “nynorsk”

ニーノシュク

Every word from Proto-Indo-European *nér →Every word from Proto-Germanic nurþraz →Every word from Proto-Germanic nurþrōnijaz →