Good Afternoon

I am hoping someone can please assist or direct me in the right direction

I am a Peruvian Passport Holder (currently in Peru) I am hoping to relocate to Spain to live an work

My Great Grandmother was from Spain and moved to Peru around 1900.
My grandmother was born in Peru in 1908 and my father - also born in Peru in 1946.

I have noted many people write about about their grandparents and not great grandparents for ancestral visas -
I am as a allowed to apply for an ancestral visa bases on these ground

Any advise / help and more information on this would be greatly appreciated.

Thank you