Oscar also had a son and here is the family in 1890 1900 in Stockholm. Unfortunately Margareta was a widow....
Lundqvist, Margareta Olivia b. 1857 - Mother
Anna b. 1884
Nils Vilhelm b. 1894
Margareta's maiden name was Nyholm.
Just saw this bit of info...
"Margareta's maiden name was NYHOLM"...
My great Grandmother, one of Erik NYHOLM's daughters was called 'Margretta' ...then my Grandmother ( her daughter) was 'Eliza Margretta' and my sister has ' Marguerite' as a middle name.
Possibly a coincidence but may be worth seeing if there is a connection to this use of the name in my NYHOLM descendants and this lady from the LUNDQUIST family.
Cheers,
Julie