Where does “我が国” come from?

我が国 (Japanese) comes from Japanese 我, from Old Japanese 我, from Old Japanese れ — nominalizing suffix used to form pronouns, often from demonstratives: one, thing.

我が国 (Japanese): my country; our country; country of the speaker or author

Definitions

my country; our country; country of the speaker or author

Ancestry of “我が国”, step by step

我が国 traces back through two separate lines of ancestry.

via Japanese 我

Step	Language	Word	Meaning
1	Japanese	我	first person singular pronoun: I, me, oneself;...
2	Old Japanese	我	first-person personal pronoun: I, me;...
3	Old Japanese	れ	nominalizing suffix used to form pronouns, often from demonstratives: one, thing

via Japanese 国

Step	Language	Word	Meaning
1	Japanese	国	a land, a large place; a country in general, a...
2	Old Japanese	国	—

Every word from Old Japanese れ →Every word from Old Japanese 我 →Every word from Japanese 我 →