Where does “Ērika” come from?

Ērika (Latvian) comes from Latvian Ēriks, from Old Norse Eiríkr, from Proto-Norse *Aiwa-rikiaʀ.

Ancestry of “Ērika”, step by step

Step	Language	Word	Meaning
1	Latvian	Ēriks	—
2	Old Norse	Eiríkr	—
3	Proto-Norse	*Aiwa-rikiaʀ	—