Where does “vascofrancés” come from?

vascofrancés (Spanish) comes from Spanish francés, from Latin francēnsis, from Latin francia, from Latin -ia, from Latin -ius, from Proto-Italic -jōs, from Proto-Indo-European -yós — Creates adjectives from noun or verb stems.

Ancestry of “vascofrancés”, step by step

vascofrancés traces back through two separate lines of ancestry.

via Spanish francés

StepLanguageWordMeaning
1SpanishfrancésFrench; Frenchman, inhabitant of France; the...
2LatinfrancēnsisFrench
3Latinfrancianominative plural of francium; accusative plural...
4Latin-iaUsed to form a feminine abstract noun, usually...
5Latin-iusforming adjectives from nouns; nominative neuter...
6Proto-Italic-jōsForms comparative adjectives
7Proto-Indo-European-yósCreates adjectives from noun or verb stems

via Spanish Vasco

StepLanguageWordMeaning
1SpanishVascoBasque
2LatinvascoVascon
3LatinVasconesVascones
4Ancient GreekΟὐάσκωνεςVascons
Every word from Proto-Indo-European -yósEvery word from Latin -iaEvery word from Latin -ius