Spaghetti western adaptations, versions, remakes and reworkings of other works

So, there’ obviously Kurosawa’s Yojimbo which was remade by Leone as AFoD, and that also influenced Django to a degree. I also recall reading about spag-west adaptations of Greek and Shakespearean tragedies, but can’t remember any names right now.
Any other examples?

Johnny Hamlet is a based on Hamlet.

I think Return of Ringo was a little bit influenced by Homer’s Odyssey

Requiem para el gringo is based on Seppuku by Masaki Kobayashi, John The Bastard by Armando Crispino is based on Don Juan and The Forgotten Pistolero is based on the myth about Orestes. Cannot recall any other influences.

Quite a few SWs were based on novels but nothing at the moment springs to mind.

I seem to recall reading that The Hellbenders is based on a novel.

Day Of Anger is supposedly based of a German novel.

Wonder what Spaghetti western claims to be based on a novel etc and is not really…

No mention of ‘The Good, the Bad, the Weird’? That movie is a good one on its own!