They are called Smorkniv in Sweden where they get made and used more often.
Its also an excuse to play with Ochre milk paints that I like to make up, as the wood on these is Birch, so you can enjoy the plain simplicity of the wood against the brightly colored handles. I first saw a version of these being made by a very famous and creative craftsman called Jögge Sundqvist via his book Schnitzen.
Another leader in Green woodworking Drew Langster of Country Workshops in the USA www.countryworkshops.org is currently running a butter knife project where you can send in your version of these utensils. Give it a try if your into wood carving, as they are a great introduction to the craft.
Now available in the web SHOP if you fancy one