Where does “Aagni” come from?

Aagni (Skolt Sami) comes from Ancient Greek ἁγνός, from Ancient Greek ἁγνεία, from Ancient Greek ᾰ̔γνός.

Ancestry of “Aagni”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	ἁγνός	pure, chaste; holy, sacred; purifying
2	Ancient Greek	ἁγνεία	purity, chastity; purification, cleansing
3	Ancient Greek	ᾰ̔γνός	—