Her Mother (Magdalene, George's first wife, is mistakenly linked as a daughter. This is actually George's second wife, Catharine's, mother):


b. 28 March 1827, d. after June 1900
Margaretha Rohwer was born on 28 March 1827 at Germany. She married George Auch circa 1846. Margaretha Rohwer died after June 1900.
As of circa 1846,her married name was Auch. She and George Auch immigrated in 1885. Margaretha Rohwer had 12 with 2 living in 1900 children. She was listed as mother-in-law in George Ohrt's household on the 1900 Census at Jefferson, Douglas, Nebraska.1
Worldcon=N
Children of Margaretha Rohwer and George Auch

Magdalene C. Auch+ b. 29 Apr 1848, d. 15 Mar 1884
John Auch+ b. Jun 1857, d. a May 1910
Helena Auch+ b. 5 Aug 1859, d. 5 Feb 1894

Father:

George Auch
M, b. 25 April 1818, d. after June 1900
George Auch was born on 25 April 1818 at Germany; also reported as Apr 1817. He married Margaretha Rohwer circa 1846. George Auch died after June 1900.
George Auch and Margaretha Rohwer immigrated in 1885. George Auch was listed as father-in-law in George Ohrt's household on the 1900 Census at Jefferson, Douglas, Nebraska.1


Children of George Auch and Margaretha Rohwer (Catharine's siblinngs)

NOT SO - Magdalene C. Auch+ b. 29 Apr 1848, d. 15 Mar 1884



John Auch+ b. Jun 1857, d. a May 1910
b. June 1857, d. after May 1910
John Auch was born in June 1857 at Germany. He was the son of George Auch and Margaretha Rohwer. John Auch married Sophia (?) circa 1890. John Auch died after May 1910.
John Auch was listed as the head of a family on the 1910 Census at Richland, Washington, Nebraska; living next door to Detlef Desler.1


Note sure this about Helena is correct:

Helena Auch+ b. 5 Aug 1859, d. 5 Feb 1894
Helena Auch
F, b. 5 August 1859, d. 5 February 1894
Helena Auch was born on 5 August 1859 at Germany. She was the daughter of George Auch and Margaretha Rohwer. Helena Auch married Claus Thun before 1885. Helena Auch died on 5 February 1894 at Washington, Nebraska, at age 34.
As of 1892,her married name was Thomsen.

Maybe ... 10/8/1892 THOMPSEN, CARL AUCH, LENA 5 99

Claus Thun
M, b. 15 May 1841, d. March 1907
Claus Thun was born on 15 May 1841 at Germany. He married Helena Auch, daughter of George Auch and Margaretha Rohwer, before 1885. Claus Thun died in March 1907 at age 65.