Now that you have met Sven Peter Swenson, let me introduce the whole family that was living in Sweden or had emigrated to America at the time of the letters.
Father--Sven Jonsson born Aug 5 1805 and died Nov 16, 1887
Mother-Greta Pehrsdotter born Nov 19 1811 and died March 13 1904
Children:Anna Sofia Swensdotter born April 3, 1831 died Jan 18, 1934 (she lived to be 103 years old)
Sven Petter Swenson born Jan 18 , 1833 died March 1870 Immigrated in 1857
Jonas Victor Swenson born Oct 1, 1835 died Mar 13, 1933 Immigrated in 1870
Hans Alfred Swenson born Feb 9, 1838 Died in 1870 Immigrated in 1870
Greta Lovisa Swensdotter born May 21, 1840 Immigrated in 1868
Kristina Charlotta Swensdotter born Oct 1842
Johan August Swenson born Mar 24, 1836 Immigrated in 1868
Gustav Albert Swenson born Spet 17, 1848 died April 15, 1935
Gottfried Swenson born Sept 12, 1851 died Feb 19, 1921
Frans Oskar Swenson born May 22, 1856
As you can see five of the siblings came to America. Gustav Albert came to visit Jonas Victor for a short time and then returned to Sweden.
The writers of the Letters to Spakarp are Sven Petter Swenson, Carolina Swenson, Greta Lovisa Swenson Olsson, Jonas Victor Swenson, Hans Alfred Swenson and Johan August Swenson.