I am actively researching our family as well. This is what I have come up with so far
John and Katherine Pfeiffer are my g grandparents.
They both were born in New York.
Their parents immigrated to America prior to 1850.
An early census show their parents coming from Germany. Still trying to track that down.
One source indicates they were Jesse(jake)1853 (Kisner, Kistner SP), (approx)and Martha Stuedeman, studeman His father was George (Kisner, Kistner SP), (approx)1816 - 1838 from Germany
Antony (Anton), a millwright, was my grandfather.
Freda Mareske (his wife), a shoe dresser, born 1886, in Germany. Her family immigrated in 1892 at age 6 and is my grandmother.
Her brother Paul, born 1889,
Earnst, born 1891, are my great uncles.
Katherine’s maiden name was Kitzner (Kisner, Kistner SP), (approx)
she was born 1856 and John was born 1850, both being born in New York. John was born in new York, as were George and Antony. The moved to Dubuque between 1879 and 1885 where Rosa was born. Freda was 6 years old.
John Pfeiffer 1850
Katherine Kitzner 1856
John son Dec 1874
George son Aug 1877
Antony son Oct 14, 1878 - Mar 20, 1941
Rosa dau Jan 1885
Henry son Apr 1890
Elizabeth dau Jul 1891
Frank son Oct 1892
Jacob son Jun 1884
Mame dau Oct 1894
Charles son Aug 18, 1896 - Nov 1, 1968
Anton Pfeiffer and Freda Mareske: Married 25 Jan, 1906 in Dubuque, Iowa
All the children of Anton and Freda were born in Dubuque, IA
George son 1906
John son 1908
Henry son 1909
Clarence son 1911
Ernest son 1912
Clara dau 1914
Margaret dau 1918
Bernice dau 1920
Katherine dau 1921
Elizabeth dau 1922
Vincent son Nov 27, 1923 - Aug 19, 1969
Roy son 1929
My dad said there were a total of 14 children. My guess is that two died and were not listed in the census.
They lived at 828 E. 16th St. Dubuque, Iowa
Freda lived at 1354 Maple St., Dubuque, Iowa which is about two blocks from the Pfeiffers.
Freda’s parents were Andrew Mareske: born Sept 1856 and Katherine Voelker born November 1860. They were all from Germany and immigrated to American 1n 1892 when Freda was 6 years old. She had two brothers,
Paul: 1889,
Ernest: 1891
Hope this helps.