Gopher,
No the Viking age bows are not the same. The real Holmegaard (found in Holmegaard Denmark) is shaped sort of like a skinny paddle bow (or you could say a fat-limbed long bow) they had a small "waisted" grip, the limbs had convex backs and realitively flat bellies. The Mollegabet pattern is the one with the wide working limbs and the "skinny" levers. The earliest forms of this type are highly Bi-convex (back & belly), the middle period were the same but they were lower bi-convex, and the later versions were bi-convex so little they were nearly like our american flat bows (flat back and belly). The Sweedish pattern (just found one in Sweeden about a year ago ( it's not on display yet at the national museum) and that bow a rigid handled "flat bow" straight tapered from grip fade to tip (both belly and plan view) the tip is rather wide maybe 1/2 to 3/4 and end in a pin knock.
Dont mean to get so technical but this is my understanding from some correspondence I had with the Danish National Museum. As far as I know most people call the mollegabet pattern a "Holmegaard" bow and that's ok with me....but ya did ask, sorry for the long winded answer. Actually I've been thinking about the Sweedish pattern and it might just be the forerunner of the Welch "short-bow"...nobody has ever recovered one of those....but they are described and the two sound like they are pretty similiar (the last is just a guess).
half eye