Where does “Khalkis” come from?

Khalkis (Finnish) comes from Ancient Greek χαλκίς, from Ancient Greek χαλκός, from Latin pȳritēs, from Ancient Greek πῡρίτης λίθος, from Ancient Greek πῦρ, from Proto-Hellenic *pāwər.

Ancestry of “Khalkis”, step by step

Step	Language	Word	Meaning
1	Ancient Greek	χαλκίς	unknown bird mentioned by Aristotle; European...
2	Ancient Greek	χαλκός	copper, or copper alloyed with tin, bronze;...
3	Latin	pȳritēs	pyrite
4	Ancient Greek	πῡρίτης λίθος	stone of fire, flint
5	Ancient Greek	πῦρ	a fire; lightning; a fever
6	Proto-Hellenic	*pāwər	—

Every word from Proto-Hellenic *pāwər →Every word from Ancient Greek πῦρ →Every word from Ancient Greek πῡρίτης λίθος →