Where does “Saint Kitts và Nevis” come from?

Saint Kitts và Nevis (Vietnamese) comes from English Nevis, from Spanish Nieves, from Spanish nieves, from Spanish nieve, from Vulgar Latin *nĕvem, from Latin nix, from Latin -eus, from Ancient Greek -εῖος — Creates adjectives from verb stems.

Ancestry of “Saint Kitts và Nevis”, step by step

Saint Kitts và Nevis traces back through 3 separate lines of ancestry.

via English Nevis

Step	Language	Word	Meaning
1	English	Nevis	—
2	Spanish	Nieves	derived from the given name, or from a nickname for someone with white hair
3	Spanish	nieves	plural of nieve
4	Spanish	nieve	snow; ice cream
5	Vulgar Latin	*nĕvem	—
6	Latin	nix	snow; white hair
7	Latin	-eus	argentum + API → argenteus; ferrum + API →...
8	Ancient Greek	-εῖος	Forms adjectives, usually with a meaning of "of"...
9	Proto-Indo-European	-iHwós	—
10	Proto-Indo-European	-wós	Creates adjectives from verb stems

via Vietnamese và

Step	Language	Word	Meaning
1	Vietnamese	và	and; To shovel food from a rice bowl into one's...
2	Chinese	和	harmonious
3	Japanese	和	peace, harmony, tranquillity, serenity; sum
4	Middle Chinese	和	—

via English Saint Kitts

Step	Language	Word	Meaning
1	English	Saint Kitts	—
2	Spanish	San Cristóbal	—

Every word from Proto-Indo-European -wós →