Ewesheep, I feel your pain with the names being the same...In my family they favored the male names of Peter, Frederick and one other, and the female names of Sarah, Elizabeth, Anne and Mary. Big family, lots of people with the same first names, and they liked marrying their cousins. So you get multiple generations of Peter Branstetters marrying Sarahs, Elizabeths or Anne Branstetters.
I'm not sure what this says about that branch of the family...too many people with the same last name? Unimaginative at looking for a mate? Wanted a girl just like mom, right down to exactly the same name? I'm just surprised that non of them seem to have three eyes.
With the Scandanavian names, you might want to keep in mind that first sons were named for their paternal grandfathers, and then took their father's first name for a last names....Anders Jansen's first born son would be Jan Anderson, and his firstborn grandson would be again Anders Jansen. Same names, offset by one generation.