Where does “Eirikur” come from?

Eirikur (Faroese) comes from Old Norse Eiríkr, from Proto-Norse *Aiwa-rikiaʀ.

Ancestry of “Eirikur”, step by step

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