Where does “Gresia” come from?

Gresia (Ilocano) comes from Spanish Grecia, from Latin Graecia, from Latin -ia, from Latin -ius, from Proto-Italic -jōs, from Proto-Indo-European -yós — Creates adjectives from noun or verb stems.

Ancestry of “Gresia”, step by step

Step	Language	Word	Meaning
1	Spanish	Grecia	Greece
2	Latin	Graecia	—
3	Latin	-ia	Used to form a feminine abstract noun, usually...
4	Latin	-ius	forming adjectives from nouns; nominative neuter...
5	Proto-Italic	-jōs	Forms comparative adjectives
6	Proto-Indo-European	-yós	Creates adjectives from noun or verb stems

Every word from Proto-Indo-European -yós →Every word from Latin -ia →Every word from Latin -ius →