Where does “sârbo-croată” come from?

sârbo-croată (Romanian) comes from Romanian sârbă, from Romanian -ă, from Latin illa, from Latin ille, from Latin olle, from Proto-Italic *olnos — that.

sârbo-croată (Romanian): Serbo-Croatian language

Definitions

Serbo-Croatian language

Ancestry of “sârbo-croată”, step by step

sârbo-croată traces back through two separate lines of ancestry.

via Romanian sârbă

Step	Language	Word	Meaning
1	Romanian	sârbă	Serbian language
2	Romanian	-ă	Forms certain female equivalent nouns
3	Latin	illa	nominative feminine singular of ille; nominative...
4	Latin	ille	that; those; "; demonstrative pronoun "; that...
5	Latin	olle	Archaic form of ille
6	Proto-Italic	*olnos	that

via Romanian croată

Step	Language	Word	Meaning
1	Romanian	croată	a Croat woman
2	Romanian	croat	Croat, Croatian; Croatian
3	French	croate	Croatian; from, or pertaining to Croatia or its...
4	Latin	Croata	Croat
5	Proto-Slavic	xorvatъ	Croat

Every word from Proto-Italic *olnos →Every word from Latin olle →Every word from Latin ille →