— born in Jackson, Jackson Co., MI:
  9.  Charles HAUCK, b. Mar 1873; d. 1948, Minneapolis, Hennepin Co., MN
10.  Caroline HAUCK, b. 11 Dec 1874; d. 16 Aug 1876, Jackson, Jackson Co., MI
11.  Keline HAUCK, b. 19 Jul 1877; d. 30 Sep 1877, Jackson, Jackson Co., MI

There were likely additional children born after the 1880 census.

1.  LDS.  Family Search: Internet Genealogy Service:  IGI - International Genealogical Index (online at FamilySearch.org):

Valentin HAUCK Birth: 12 Jan 1840, Kirrlach, Karlsruhe, Baden Father: Johann Balthasar HAUCK; Mother: Maria Eva SCHUMACHER Source: patron submission

Location for all: Katholisch, Kirrlach, Karlsruhe, Baden Magdalena; Christening: 09 Mar 1869 Genovefa; Christening: 08 Feb 1870 Katharina <HAUK>; Christening: 10 Apr 1872 Father: Valentin HAUK; Mother: Maria Theresia BAADER Source: Kirchenbuch, 1669-1888. Katholische Kirche Kirlach (A. Bruchsal)

Location for all: Kirrlach, Karlsruhe, Baden Leopold HAUCK; Birth: 19 Oct 1861 Ludwig HAUCK; Birth: 24 Aug 1863 Friedrich HAUCK; Birth: 02 Nov 1864; Death: 02 Mar 1865 Georg Adam HAUCK; Birth: 21 Dec 1865 Magdalena HAUCK; Birth: 06 Mar 1869; Death: 18 Mar 1869 Genovefa HAUCK; Birth: 06 Feb 1870 Friedrich HAUCK; Birth: 11 Apr 1871; Death: 08 Jun 1871 Father: Valentin HAUCK; Mother: Maria Theresa BAADER Source: patron submissions

Valentine HAUCK Spouse: Louisa STRAUB or HERRLE Marriage: 19 Nov 1878, Jackson, Michigan Source: Marriage Records 1833-1910. Jackson County (Michigan). County Clerk

2.  1870 Census Every-Name-Index/Images (online at Ancestry.com):  not found because they're still in Germany.

3.  1880 Census Every-Name-Index/Images (online at Ancestry.com, Image #14 of 45 — indexed "Hawk"):  Mill [St/Rd], Jackson (Ward 5), Jackson Co., MI, Roll T9_585, p. 358B, PN 14, SD 1, ED 121, enumerated 5 Jun 1880, official enumeration date 1 Jun 1880 (extracted by Diana Gale Matthiesen):¤•

1880:  for an explanation of the column headings, please see What the Numbers in the Federal Census Mean (missing columns contained no data).

1

2

3

4

5

6

7

8

9

10

13

21

24

25

26

106

140

Hauk Valentine

W

M

40

Husband

/

Hotel Keeper

Baden

Baden

Baden

____ Louisa

W

F

31

Wife

/

Keeps House

Bavaria

Bavaria

Bavaria

____ Leopold

W

M

18

Son

/

Cigar Maker

Baden

Baden

Bavaria

____ Louis

W

M

17

Son

/

Candy Maker

Baden

Baden

Bavaria

____ George

W

M

14

Son

/

Beer Bottler

Baden

Baden

Bavaria

____ Emma

W

F

12

Dau

/

At School

/

Michigan

Baden

Bavaria

____ Matilda

W

F

10

Dau

/

At School

/

Michigan

Baden

Bavaria

____ Genevieve

W

F

10

Dau

/

At School

/

Michigan

Baden

Bavaria

____ Charles

W

M

7

Son

/

At School

/

Michigan

Baden

Bavaria

____ Fred

W

M

2/12

Mar

Son

/

Michigan

Baden

Bavaria

Genevieve was born in Baden, not Michigan.  The big question is where Emma and Matilda were born.  If they were truly born in Michigan, before Valentin & Maria immigrated to the U.S., then they are probably Louisa's children from her prior marriage.  If I could only find Louisa in the 1870 census, we'd know the answer.  The only child here who is both Valentine's and Louisa's is Fred.

4.  1890 Census:  the 1890 Census Population Schedules were destroyed.

5.  1900 Census Every-Name-Index/Images (online at Ancestry.com):  can't find Louisa.  Leo HAUK (æ 38, b. Oct 1861, Germany, cigarmaker) is living in Minneapolis, MN.  Lewis HAUCH (æ 36, b. Aug 1863, Germany, candymaker) is living in Mankato, Blue Earth Co., MN.  Charles HAUCK (æ 26, b. Mar 1873, MI, candymaker) is living in St. Paul, MN.  Genevieve (HAUCK) HEILER (æ 30, b. Feb 1870, Germany) is living with her husband, Edmund HEILER (æ 36, b. May 1864, Germany) in Jackson, MI.

6.  1910 Census Every-Name-Index/Images (online at Ancestry.com):  L. HAUK (æ 47, b. Germany, cigarmaker) is living in Minneapolis, MN.  Charles HAUCK (æ 36, b. MI, candymaker) is living in St. Paul, MN.  Genevieve (HAUCK) HEILER (æ 40, b. Germany) is living in Jackson, MI, with her husband, Edmund HEILER.

7.  1920 Census Every-Name-Index/Images (online at Ancestry.com):  Leo HAUK (æ 58, b. Germany, cigarmaker) is living in Minneapolis, MN.  Lewis HAUCK (æ 56, b. Baden, candymaker) and Charles HAUCK (æ 46, b. MI, candymaker) are living in St. Paul, MN.  Genevieve HEILER (æ 49, b. Baden) is living in Jackson, MI, with her husband, Edmund HEILER.

8.  1930 Census Every-Name-Index/Images (online at Ancestry.com):  Genevieve J? HEILER (æ 60, b. Baden) is living in Jackson, MI, with her husband, Edmund HEILER.

9.  Michigan Department of Community Health.  GenDIS: Genealogical Death Indexing System, 1867-1897 (online at the Michigan State Goverment web site):

Name:	HAUX, Caroline	HAUCK, Keline
Date of Death:	16-Aug-1876	30-Sep-1877
Ledger Page:	21	25
Record Number:	189	329
Place of Death:	Jackson Sixth Ward	Jackson Fifth Ward
County of Death:	Jackson	Jackson
Sex:	Female	Female
Race:	White	White
Marital Status:	Single	Single
Age:	1 year 8 months 5 days	2 months 11 days
Cause of Death:	cholera infantum	cramps in stomach
Birthplace:	Michigan	Michigan
Occupation:
Father's Name:	Haux, Valentine	Hauck, Valentine
Father's Residence:	Jackson Mich	Jackson Michigan
Mother's Name:	Haux, Mary	Hauck, Mary B
Mother's Residence:	Jackson Mich	Jackson Michigan
Date of Record:	25-May-1877	4-Jun-1878

Can't find Valentine, Mary, or Louisa as decedants, and I really looked.

10.  Birthdate calculated using Ben Buckner's Birthdate Calculator.

Name	Deathdate	Age at Death	Result
Caroline HAUX	16 Aug 1876	5d 8m 1y	11 Dec 1874
Keline HAUCK	30 Sep 1877	11d 2m 0y	19 Jul 1877

11.  One World Tree (online at Ancestry.com).

12.  Messages posted to the HAUCK Surname Board (online at RootsWeb.com/Ancestry.com).