Jonasson, Janne b.1853 ,wife, Amanda Olivia Elofsdotter b. 1862

[Susan Adele Slack]

We need help on our Swedish ancestors please!  
My great grandfather was Janne Jonasson, b. 25 Jun 1853 in Tornekullen, Goteborg. Married Amanda Olivia Elofsdotter on 23 Jul 1880. Amanda b. 30 Aug 1862 and died 3 Jan 1950. Janne died 14 March 1930.  His parents were Jonas Johanneson, b. 27 Sep 1814, and Christina Olsdotter, b. 2 Mar 1823, both we think in Save, Goteborg.  This is where we have hit a wall and can find no more on this family.  Does any one know any more about these people? It would be a nice gift for my mother to know more about her father's family.  (Her father was Einar Bror Janneson b. 22 Sept 1901 in Lillbaka, Hissingkora, Sweden. He came to the USA as a young man.)