Where does “Republic of El Salvador” come from?

Republic of El Salvador (English) comes from English Republic, from Middle French république, from Latin republica, from Latin rēspublica, from Latin rēs, from Latin vindicatio, from Latin vindicō, from Latin vindex — small stone, pebble; gravel, rubble.

Ancestry of “Republic of El Salvador”, step by step

Republic of El Salvador traces back through 3 separate lines of ancestry.

via English Republic

Step	Language	Word	Meaning
1	English	Republic	The Roman Republic
2	Middle French	république	republic
3	Latin	republica	ablative singular of rēspublica
4	Latin	rēspublica	a republic, commonwealth; the state, nation
5	Latin	rēs	thing, object, stuff
6	Latin	vindicatio	civil lawsuit; protection, defence; vindication;...
7	Latin	vindicō	to lay claim to as one's own (often with sibi)
8	Latin	vindex	claimant, vindicator
9	Latin	dīcō	to say, talk, speak, utter, mention
10	Latin	-tiō	tion, -ation, -ing
11	Latin	dissertātiō	(spoken) dissertation, discourse, disquisition
12	Latin	dissertus	arranged, disposed; explained
13	Latin	disserere	second-person singular future passive indicative...
14	Latin	dis-	asunder, apart, in two; reversal, removal;...
15	Latin	calceus	shoe
16	Latin	calx	limestone; chalk; the finish line
17	Ancient Greek	χάλιξ	small stone, pebble; gravel, rubble

via English of

Step	Language	Word	Meaning
1	English	of	API; Expressing distance or motion; "Expressing...
2	Middle English	of	of; off; until
3	Old English	of	of, from, off, out of
4	Old English	æf	of
5	Proto-Germanic	*ab	—
6	Proto-Indo-European	apó	—

via English El Salvador

Step	Language	Word	Meaning
1	English	El Salvador	Places in the Philippines
2	Spanish	El Salvador	The Saviour

Every word from Ancient Greek χάλιξ →