A true Geranium, as opposed to a "geranium" which is really a Pelargonium. I'll leave it to the experts to say which species or cultivar. There are many and they all look very similar.
"Possibly Geranium 'Johnson's Blue' or 'Rozanne'. You can do a Google image search for pix of both." Yes, Or Brookside! Thank you!
This site is in German, but the plant names are in English. Lots to look at but you may find yours. http://home.eduhi.at/teacher/geranium/profilstart.htm This one is in Sweedish. http://www.sitecenter.dk/may-britts-have/frontpage/ This one is all in English! http://www.overthegardengate.net/garden/archives/category.asp?CatID=175 Newt