Hallo Richard.
My English is not so good,but I shall do my best.
I have doone some digging in your family here in Sweden, and I found them all

Olof Jansson 1820 Stensgård Lekvattnet parish.
Kjerstin Ersdotter 1816 Östmark parish.
Children:
Anders 1845
xOlof 1846
Kjerstin 1849 They lived in Rundsjötorp, a farm in
Marit 1854 Östmark parish.
Otto 1857
Maria 1860
Karolina 1863
The whole family emigrate to USA the 6th of April 1865, and the 18th of Sep. 1872 the family returnd to Sweden except Anders,Olof and Marit. They was verry poor people, so they lived in a work house(pauper confession of failure).
The first of Dec. 1877 Otto mowed to Västerås , a county near Stockholm, and gunnilsbo parish. The 3th of Mars 1880 Karolina also mowed to Västerås county and Harker parish.
The 2nd of Aug. 1881, the parents mowed back to USA, probaly to some of their three children wich lived in USA since 1865. Maria lived as a none-existens, and disappear.
I was not able to find her after 1885.
I dont thinh you have some relative in Östmark and Värmland, but maby in Västerås if Otto and Karolina was married.
This was all I was able to find, and I hope it gave you a answhere. Regards from Tore Bakken Torsby Sweden.