Son of Henry Clay Kirby and Martha Vashtie Grinter Kirby.

Married to Mary Cecil Grinter around 1920.

William and Mary were the parents of:
William Henry Kirby
Nona Beth Kirby Willey(1921-2002)
James L Kirby(1923-1975)
Maxey Neal Kirby
Curtis Newton Kirby

This is to verify any information
https://www.familysearch.org/tree/person/details/K2W5-622

Information may not be 100% correct. I based information from FS. if anything needs to be corrected please send me a suggestion. Thank you
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1900 United States Federal Census
Name: William C Kirby
Age: 5
Birth Date: Nov 1894
Birthplace: Kansas
Home in 1900: Preston, Platte, Missouri
Ward of City: First
Sheet Number: 2B
Number of Dwelling in Order of Visitation: 38
Family Number: 39
Race: White
Gender: Male
Relation to Head of House: Son
Marital Status: Single
Father's name: Henry C Kirby
Father's Birthplace: Mississippi
Mother's name: Mattie O Kirby
Mother's Birthplace: Kansas
Household Members:
Name Age
Henry C Kirby 42
Mattie O Kirby 42
Wilbur H Kirby 9
Chas G Kirby 7
William C Kirby 5
Mattie I Kirby 4/12

1910 United States Federal Census
Name: William C Kirby
Age in 1910: 15
Birth Year: abt 1895
Birthplace: Kansas
Home in 1910: Wyandotte, Wyandotte, Kansas
Street: Muncie Road
Race: White
Gender: Male
Relation to Head of House: Son
Marital Status: Single
Father's name: Henry C Kirby
Father's Birthplace: Mississippi
Mother's name: Mattie V Kirby
Mother's Birthplace: Kansas
Native Tongue: English
Attended School: Yes
Able to Read: Yes
Able to Write: Yes
Household Members:
Name Age
Henry C Kirby 52
Mattie V Kirby 52
Wilbur H Kirby 19
Charles G Kirby 17
William C Kirby 15
Mattie J Kirby 10
Annie T Kirby 6

1920 United States Federal Census
Name: William C Kirby
Age: 25
Birth Year: abt 1895
Birthplace: Kansas
Home in 1920: Wyandotte, Wyandotte, Kansas
Street: Road N and S C Main Road Him Ginter North Or S Delware St
House Number: House
Race: White
Gender: Male
Relation to Head of House: Head
Marital Status: Married
Spouse's Name: Mary C Kirby
Father's Birthplace: Mississippi
Mother's Birthplace: Kansas
Able to Speak English: Yes
Occupation: Farmer
Industry: Home Farm
Employment Field: Own Account
Home Owned or Rented: Rent
Able to Read: Yes
Able to Write: Yes
Household Members:
Name Age
William C Kirby 25
Mary C Kirby 20

1930 United States Federal Census
Name: William C Kirby
Birth Year: abt 1895
Gender: Male
Race: White
Birthplace: Kansas
Marital Status: Married
Relation to Head of House: Head
Home in 1930: Wyandotte, Wyandotte, Kansas
Street address: Grinter Height
Dwelling Number: 152
Family Number: 152
Home Owned or Rented: Owned
Home Value: 2000
Radio Set: No
Lives on Farm: Yes
Age at First Marriage: 24
Attended School: No
Able to Read and Write: Yes
Father's Birthplace: Mississippi
Mother's Birthplace: Kansas
Able to Speak English: Yes
Occupation: Carpenter
Industry: Odd Jobs
Class of Worker: Wage or salary worker
Employment: Yes
Household Members:
Name Age
William C Kirby 35
Cecile M Kirby 30
William H Kirby 9
Nona B Kirby 8
James L Kirby 7
Maxey N Kirby 5
Curtis N Kirby 1

1940 United States Federal Census
Name: William C Kirby
Age: 45
Estimated birth year: abt 1895
Gender: Male
Race: White
Birthplace: Kansas
Marital Status: Married
Relation to Head of House: Head
Home in 1940: Wyandotte, Wyandotte, Kansas
Farm: Yes
Inferred Residence in 1935: Wyandotte, Wyandotte, Kansas
Residence in 1935: Same House
Resident on farm in 1935: Yes
Sheet Number: 5B
Number of Household in Order of Visitation: 91
Occupation: Carpenter
Industry: Building
House Owned or Rented: Owned
Value of Home or Monthly Rental if Rented: 800
Attended School or College: No
Highest Grade Completed: High School, 4th year
Class of Worker: Wage or salary worker in private work
Weeks Worked in 1939: 35
Income: 900
Income Other Sources: No
Household Members:
Name Age
William C Kirby 45
Mary C Kirby 40
William H Kirby 20
Nona B Kirby 18
James L Kirby 17
Maxey N Kirby 15
Custia N Kirby 11