Waldemar was the son of John Henry Borchelt (b. 22 Nov 1873 d. July 1966) and Augusta J. Gehle (b. 1875 in IL). He married Hilda B. Koenemann (daughter of Edward F. Koenemann and Sophia Meyer) on 11 Jun 1922 in Bingen, Adams County, Indiana, St. John's.
Children of HILDA KOENEMANN and WALDEMAR BORCHELT are:

i. RAYMOND E. BORCHELT
ii. EILEEN E. BORCHELT
iii. LUCILLE C. BORCHELT
iv. DONALD E. BORCHELT
v. WALLACE C. BORCHELT
vi. KENNETH P. BORCHELT
vii. MARTHA A. BORCHELT
viii. CAROLYN G. BORCHELT

Source:
http://familytreemaker.genealogy.com/users/
e/i/f/Eric-W-Eifrig/GENE4-0007.html.
~~~~~~~~~~~~~~~~~~~~~~~~~~
"United States Census, 1900," Waldemar Borchelt in household of John Borchelt, ED 18 Lone Grove Township, Fayette, Illinois, United States

name: Waldemar Borchelt
titles & terms:
event: Census
event date: 1900
event place: ED 18 Lone Grove Township, Fayette, Illinois, United States
birth date: Jun 1898
birthplace: Illinois
relationship to head of household: Son
father's birthplace: Illinois
mother's birthplace: Illinois
race or color (standardized): White
gender: Male
marital status: Single
years married:
estimated marriage year:
mother how many children:
number living children:
immigration year:
page: 7
sheet letter: B
family number: 136
reference number: 80
film number: 1240300
digital folder number: 004113759
image number: 00218

Household Gender Age Birthplace
head John Borchelt M 27 Illinois
wife Augusta Borchelt F 25 Illinois
son Waldemar Borchelt M 2 Illinois
mother-in-law Lizzie Gehle F 70 Germany

Source Citation
"United States Census, 1900," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MS7B-7ZW : accessed 10 Aug 2012), Waldemar Borchelt in household of John Borchelt, ED 18 Lone Grove Township, Fayette, Illinois, United States; citing sheet 7B, family 136, NARA microfilm publication T623, FHL microfilm 1240300.
~~~~~~~~~~~~~~~~~~~~~~~~~
"Indiana, Marriages, 1811-1959," Waldemar H Borchelt, 1922

groom: Waldemar H Borchelt
groom's race: White
groom's date of birth: 02 Jun 1898
groom's place of birth: St Peter, , Illinois
groom's residence: Fort Wayne, , Indiana
groom's number of marriage: 1
groom's father: John H Borchelt
groom's mother: Augusta Gehle
bride: Hilda B Koenemann
bride's race: White
bride's date of birth: 12 Oct 1900
bride's place of birth: Hoagland, , Indiana
bride's residence: Hoagland, , Indiana
bride's number of marriage: 1
bride's father: Edward F Koenemann
bride's mother: Sophia Meyer
informant name:
date of license: 09 Jun 1922
county of license:
date of marriage: 11 Jun 1922
place of marriage:
official:
record number:
film number: 2130031
digital folder number: 4129321
image number: 00186
number of images: 1

Source Citation
"Indiana, Marriages, 1811-1959," index, FamilySearch (https://familysearch.org/pal:/MM9.1.1/XX2L-VQ9 : accessed 08 Aug 2012), Waldemar H Borchelt and Hilda B Koenemann, 11 Jun 1922.
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
"United States Census, 1940," Waldemar H Borchelt, Ward 10, Fort Wayne, Wayne Township, Allen, Indiana, United States

name: Waldemar H Borchelt
titles & terms:
event: Census
event year: 1940
event place: Ward 10, Fort Wayne, Wayne Township, Allen, Indiana, United States
gender: Male
age: 41
marital status: Married
race (original): White
race (standardized): White
relationship to head of household (original): Head
relationship to head of household (standardized): Head
birthplace: Illinois
estimated birth year: 1899
residence in 1935: Same Place
enumeration district number: 94-96
family number: 24
sheet number and letter: 2A
line number: 14
nara publication number: T627
nara roll number: 1117
digital folder number: 005459873
image number: 00953

Household Gender Age Birthplace
head Waldemar H Borchelt M 41 Illinois
wife Hilda B Borchelt F 39 Indiana
son Raymond E Borchelt M 16 Indiana
daughter Illene E Borchelt F 15 Indiana
daughter Lucille C Borchelt F 13 Indiana
son Donald E Borchelt M 11 Indiana
son Wallace C Borchelt M 9 Indiana
son Kenneth P Borchelt M 8 Indiana
daughter Martha A Borchelt F 7 Indiana
daughter Carolyn G Borchelt F 5 Indiana

Source Citation
"United States Census, 1940," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/V119-WCW : accessed 08 Aug 2012), Waldemar H Borchelt, Ward 10, Fort Wayne, Wayne Township, Allen, Indiana, United States; citing enumeration district (ED) 94-96, sheet 2A, family 24, NARA digital publication T627, roll 1117.