Where does “おそロシア” come from?

おそロシア (Japanese) comes from Japanese ロシア, from Russian Росси́я, from Greek Ῥωσία, from Old East Slavic Русь, from Finnish ruotsi, from Proto-Finnic *roocci, from Old Swedish roþs-, from Old Norse róðr — to row; to separate; loose, sparse, rare.

おそロシア (Japanese): "Fearsome Russia", a wordplay often used in reaction to surreal modern happenings, dark echoes of the USSR, etc

Definitions

"Fearsome Russia", a wordplay often used in reaction to surreal modern happenings, dark echoes of the USSR, etc

Ancestry of “おそロシア”, step by step

おそロシア traces back through two separate lines of ancestry.

via Japanese ロシア

Step	Language	Word	Meaning
1	Japanese	ロシア	Russia
2	Russian	Росси́я	Russia
3	Greek	Ῥωσία	—
4	Old East Slavic	Русь	Rus; Ruthenia
5	Finnish	ruotsi	Swedish
6	Proto-Finnic	*roocci	Swede originally anyone from Roslagen
7	Old Swedish	roþs-	related to rowing
8	Old Norse	róðr	rowing
9	Proto-Germanic	rōþrą	oar; rudder
10	Proto-Indo-European	h₁reh₁-	to row; to separate; loose, sparse, rare

via Japanese おそろしい

Step	Language	Word	Meaning
1	Japanese	おそろしい	—

Every word from Proto-Indo-European h₁reh₁- →Every word from Old Swedish roþs- →Every word from Proto-Finnic *roocci →