My grandmother ( Mum's mum) is Maria Sidoli nee Sterlini and she was born in Bardi, Italy in 1927. Her parents were Giuseppe and Rosa Sterlini. She has two sisters, Yolanda and Giannina also born in Bardi and living in Italy.
I know that we do have some distant relatives in South Wales ( Triorchy??) as my grandfather has been there on several occasions.
I saw that your father is called Vittorio with Giuseppe as one of his brothers - perhaps there is a connection?
I would have to check with my nonna! I know it is the end of her family tree with Sterlini as she married Sidoli.
It would be interesting to hear from you.
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PS - I live in London, UK