I have been compiling death records on findagrave.com on those with my maiden name, Juhl. This was one family that came up quite a lot. The following info is the best I can figure...
The name of Anker's parents were Nis & Kristina (or Christina) Mortensen.
Nis may have been short for Nissen or Annis, he lived from 1850-1896, she lived 1853-1945.
Their children were:
John M (1890-1978) married Leah- children Lorraine, Eugene, Eugene, Harriet & Joan;
Anna;
Marius "Mike" married Pauline- child Jeanette;
Anton married Myrl- child Donna;
Anker (1893-1993)lived in Waverly with wife Olive;
Chris (1894-1988)lived in Plainfield;
Richard lived in Eldora;
Jake lived in Waverly;
I found additional information on Anker & wife Maren- their children were (I believe this Anker was the brother of Nis)
Jacob N (1873-1940) Married Mossy Jepson- child Pauline;
Simon (twin of Jacob);
Anton lived in Nashua;
Annis lived in California;
Helena Jorgensen lived in Coulter;
Anna Bryhl lived in New Hartford, Iowa;
Also found info on Marius & Hilda- child Bagge Kristensen. Bagge and his wife Shirley had 3 children- Stuart (married Cindy), Rick (married Christine) and Jens-Christian (married Kira);
Hope this helps, please let me know if you find different or additional information.
Jessica