Nicolaus Hartman married Phillipene who gave birth to

I guess if you put it that way, our last name is likely Narstad, but changed to Larson when Lars Narstad came to the US.
As far back as G'pa Em can go...
Emery Owens and Alice were parents to
Nellie Owens
who married Robert Larson
Their children were Virginia, Mabel (still living and 92 in 2011) and Emery Hartman (Grandpa)
Great Grandpa Nicolai Olsen was born in Mustad Norway in 1867(5) married Anna Lund (1880) also born in Sogn (or Laerdal)Norway 4 Nov 1880 (died 16 April 1944 in Brookings South Dakota). They had 12 children... all born in Brookings South Dakota
Edward (born 7 June 1903)
Agnes (born 5 Aug 1904, died in childbirth)
Nora (born 28 Jan 1906)
Arthur John (Born 29 Nov 1908)
Clarance Oscar (born 10 April 1910)
Myrtle Francis (born 15 Nov 1911)
Anna "Elizabeth"(born 1913, married Mr. Brusinger)
Walter James (born Feb 1914 married Christina has never lived anywhere else but the farm he was born on, still living)
Esther (born 1916, never married)
Irene (born 1918, married Mr. Fay Shade http://www.welterfuneralhome.com/sitemaker/sites/Welter1/obit.cgi?user=1263_ISchade478)
Judith "Harriet" (born 1920)
Jean (born 1926 married Grandpa Em in 1946 died 22 Sept 2006)
Grandma Jean and Grandpa Em had two children:
Thomas Hartman Larson who married Terri Gong: had two children Ryan and Amy
Amy (me, but let's just keep names strait here) married Brian and had two children Grace and Owen
Ann Margaret Truscinski has three children Jay, Sam and Katie
Katie has married Adam Peruski and have baby boy Max (2012)