Though not included in the destinataries, I could tell you about Spanish one-eyed giants, Ojáncano and Tártalo. Ojáncano appears in some legends of Cantabria, and is part of a two-sex sterile breed of giants whose only weakness is a single white hair.
Tártalo appears in some vasque legends. It is a male one-eyed, twenty-finger giant who delights breeding sheeps, throwing rocks and eating humans.
The legend published in https://www.davidtebras.com/FantasiaCelta/tartalo/ shares many elemens of the Polifemo's myth:
Two brothers were locked by Tártalo in a hut using a rock.
After saying "you today, you tomorrow", he empaled one of them in a steel skewer, roasted it and ate it.
The other brother took the skewer, put it in the fire, then nailed it on Tartalo's eye.
Blind Tártalo tried to avoid the human escape, but the human dressed himself with a sheep skin, so he could escape.
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