It's been a while since your post so you may very well have found this already, but for what it's worth:
Helge Serafia Friberg arrived NY on the 'St Louis' on 27 1900. She was born in Edsvara, Skaraborg, Sweden on April 6 1880. Parents Johannes Friberg and Kristina Johannesdotter.

Her family in 1880:
Johannes Friberg b. Sept 5 1839
Kristina Johannesdotter b. Aug 4 1841
Gerda Sofia b. Aug 10 1865
Karl Wilhelm b. Mar 15 1867
Hilda Kristina b. Jan 25 1869
Hanna Elisabet b. May 27 1871
Frans Johan b. May 7 1873
Klas Henning b. Sep 20 1876
Elin Maria b. Mar 14 1878
Helga Serafia b. Apr 6 1880

Axel Fredrik Wahlberg arrived NY on the 'Germanic' on Apr 5 1901. Parents Gustaf Aron Wahlborg and Johanna Mathilda Jonasdotter

His family in 1880:
Gustaf Aron Wahlberg, b. Nov 26 1829
Johanna Mathilda Jonasdotter b Oct 17 1835 (Nov? difficult to read - could be '10' or '11')
Carl Johan b. Jun 11 1865
Gustaf Aron b Apr 11 1869
Augusta Charlotte b Mar 3 1862
Maria Louisa b. Nov 10 1863
Brita Christina b Mar 11 1867
Anna Petronella b Feb 14 1871
Josefina Eleanora b Jun 2 1873
Davida Viktoria b. Dec 11 1875
Axel Fredrik b. Mar 23 1878

Hope this helps,

J Murphy