Thank you very much!
My ex-wife is Teresa Hunt, daughter of Douglas and Frances. I know Frances Zihlman Hunt died and Douglas was still alive last I heard. (Teresa and her father do not get along so it's been a few years since they last heard from each other.)
I have details about Teresa and her children. 5 children from 4 husbands.
I have the Zihlman and Barr line that I have no information.

The next to last line should read "4 children from 4 husbands."
Last line should read "I have no information on the Zihlman/Barr lines".

Marriage
Name Willis C. Hunt
Event Type Marriage
Event Date 19 Jan 1918
Event Place Des Moines, Polk, Iowa, United States
Age 39
Father's Name John A. Hunt
Spouse's Name Louisa M. Barr
Spouse's Age 18
Spouse's Birth Year (Estimated) 1900
Spouse's Father's Name J. A. Barr
Spouse's Mother's Name May Nichols

Louisa M. Barr,s parents
Father's Name J. A. Barr
Mother's Name May Nichols

Thank you for your input to my question.

Father's Name John A. Hunt
Spouse's Name Louisa M. Barr
Spouse's Age 18
Spouse's Birth Year (Estimated) 1900
Spouse's Father's Name J. A. Barr
Spouse's Mother's Name May Nichols

What I have found and given to me has Father's Name: Jonas Hunt 1866-1949 Monroe Cemetary Grave Memorial # 94561374 , Monroe, Missouri, USA
Mother's is Mary Alfarette Nichols. Abt 1867-? Monroe Cemetary # 94561404, Jasper, Missouri, USA

I wonder what the the discrepancies are about?

Not sure who Jonas Hunt is in your post above. The marriage has Louisa's parents as J. A. Barr & May Nichols. Below on the Births and Christenings Index it is Jonas A Barr & Mary E Nichols

Iowa, Births and Christenings Index
Name: Louisa May Barr
Birth Date: 9 Dec 1900
Birth Place: Monroe, Jasper, Iowa
Father's name: Jonas A Barr
Mother's name: Mary E Nichols
FHL Film Number: 1954518

Social Security Applications and Claims Index
Name: Jonas A Barr
SSN: 480209201
Gender: Male
Race: White
Birth Date: 11 Nov 1866
Birth Place: Hillburrough, Ohio
Father Name: George W Barr
Mother Name: Louisia Roush
Type of Claim: Original SSN.
Notes: May 1942: Name listed as JONAS A BARR

1880 census
Jonas A. Barr
Age: 13
Birth Year: abt 1867
Birthplace: Ohio
Home in 1880: Monroe, Jasper, Iowa
Race: White
Gender: Male
Relation to Head of House: Son (Child)
Marital Status: Single
Father's name: G. W. Barr
Father's Birthplace: Ohio
Mother's name: Louisa Barr
Mother's Birthplace: Ohio
Occupation: At Home
Cannot read/write:

G. W. Barr 38
Louisa Barr 40
Jonas A. Barr 13
John W. Barr 12
Cora E. Barr 10
Sopha E. Barr 5
Hancock Barr 1m

1925
Name: A J Barr
Age: 58
Gender: Male
Race: White
Birth Year: 1867
Birth Place: Ohio
Ethnicity: American
Marital Status: Divorced
Marriage Date: 1896
Years in the State: 13
Arrival Date: 1912
Arrival Place: South Dakota, USA
Religion: Methodist
Father Birth Place: Pennsylvania
Mother Birth Place: Ohio
FHL Film Number: 2368109
Sheet Number: 312

Ohio, Births and Christenings Inde
Name: Mary E. Nichols
Gender: Female
Birth Place: Muhlenburg, Pickaway, Ohio
Birth Date: 7 Apr 1869
Father's name: George H. Nichols
Mother's name: Nancy Smith
FHL Film Number: 288391