Lovisa’s Swedish passenger list says her destination is Philadelphia
She is on the “Pennsylvania, Passenger and Crew lists, 1800-1962” on ancestry as Luisa Hamlin, 60, Female, Germany (place of birth), Germany (last legal settlement), wife, No (not in US Before), No (not tourist). She arrived on the “British King” which sailed from Liverpool, and arrived in Philadelphia on 13 Sept 1886.
I know it says Germany, not Sweden, but with the language barriers - it was not always correct. The combination of age, when she arrived, where she arrived and the similarity of “Luisa Hamlin” and Lovisa Hemlin seems too circumstantial for it not to be her.
Similarly for Viktor, There is an arrival on the “British Prince” on 5 June 1883 at Philadelphia, which has Wickter Hamline, Denmark, Denmark, 20, lab. (ancestry has it indexed as “Wilhter Hamline”)
So Philadelphia is at least a starting point in the U.S.