Swedish women did not take their husband's name until the end of the 1800's

Swedish women did not take their husband's name until the late 1800's. From 'Swedish naming practices in earlier times, surnames'
http://www.algonet.se/~hogman/Naming%20practice_eng.htm

"When a man and a woman got married the woman never adopted her husband’s patronymic name - a name ending with "son". A woman could never be someone's son.
If they both had a family name, the woman still kept her family name. If the husband had a family name and the woman a patronymic name she might change her last name to her husbands family name. But it was not very likely to occur before the 1800's.
It did not become a custom for a woman to adopt her husband's surname until the end of the 1800’s, when most families had adopted family names."

Steve, I'm tagging the managers of that profile (Private User and Rose-Marie Karlsson) for you so you two can work it out.

I'm guessing you're talking about Kerstin Larsson, not Elin Andersdotter?