I'm trying to research my great grandmother Greta Alice Storthors, born 6 Jun 1915 in Vasa and died 23 Apr 1976 in Varberg, Sweden. She married four times as far as I know: first with a man who originated from Russia with the name Jaakko Mitrofanoff (he was left by the doorsteps to a orphanage in Helsinki). His birthdate according to military records is 8 mar 1909, Helsinki. He later changed his family name into Murtomaa. He was some kind of a special engineer and was recruited in the Continuation War, became a sergeant and went missing in a mission 24 Nov 1941 in Maaselkä. His body was never found.
Next, Greta married a man with the family name Hurtta, then with Poljanen and last with a Karl/Carl Andersson from somewhere around Kinna, Västra Götaland, Sweden.
From my family source I've gotten this information about Greta's parents:
Mother: Maria Granström (born around 1876 in Övermark and died around 1961-62 in Vasa)
Father: Johannes Storthors. In my notes it says "79" but I'm not sure if I mean the age of his death or the year... He also died in Vasa.
I can't find anything about these two so I would be very greateful for any information!