Harald Sæverud (Norwegian composer) has composed a piece called "Til Mor", in english: "To mum" wich is really nice.
i would appeciate those sheets too. its impossible to find norwegian piano music here.
What immediately springs to mind is Josef Suk cycle of pieces called 'About Mother' ('O matince' in the original Czech). He wrote these pieces in around 1912 for his daughter about his late wife (i.e. the girl's mother, who was also Dvorak's daughter). They are not very technically complex, but are demanding from an interpretative point of view. They are also very good pieces in my opinion.