Ginkens Marriages, etc.

I just received a scan of the Marriages page from a cousin who has the Ginkens family bible. The scan is fairly easy to read and contains the following information:

Henery A Ginkens, Mrs Alice M. McCracken, Nov. 2nd 1885
Sarah E Ginkens, James B Defrance, 12th Sept 1883
A. Harrison Ginkens, Marry M. Nelson, March 10th 1886
Martha J. Ginkens, William D Augustine, Feb. 11 1883
James B Ginkens, Brittie M. McCracken, Nov. 4th 1888
Mary E. Ginkens, Albert Carvin, April 20th 1890
J Edna Ginkens, Thos E Alter, Nov. 12, 1901
Aletha B Ginkens, Harold L Wilkin, Jan 27 1897

Henry Austin Ginkens and Martha Alice (Watson) McCracken were my 2nd great grandparents. Previous to her marriage to Henry, Martha Alice was married to a man named McCracken. I believe her first husband was David H. McCracken (born abt. 1850 in Ohio), her stepbrother, who was a son of her father Isaac Watson's 3rd wife, Louisa, but this is just an educated guess. I would love to hear from anyone with more knowledge on her first marriage. Martha had a daughter, Hattie McCracken, born about 1872 in Iowa, from this marriage.

I would also be interested to hear from anyone who knows who the father (or fathers) of Sarah E. Ginkens two children are: Vanna E. Ginkens (born Feb 1875 in Wapello County, Iowa) and Erk Harlow Ginkens (born 19 Jul 1877 in Wapello County, Iowa). One Ginkens cousin I am in touch with thinks Erk's father had the last name Harlow and that Erk may have been illegitimate. In the 1880 US Federal Census, Sarah and the kids are living with her father, Jesse Gum Ginkens in Clay Township, Washington, Iowa, and the children are listed with the last name Vandarn (alternatively, Vandorn or Van Dorn), while Sarah's surname is Ginkens.