William listed in the 1870 US Census living with parents, and siblings
Name: William H Alexander
Age in 1870: 3
Birth Year: abt 1867
Birthplace: Kentucky
Dwelling Number: 198
Home in 1870: Precinct 3, Wolfe, Kentucky
Race: White
Gender: Male
Post Office: Hazel Green
Inferred Father:
Robt J Alexander
Inferred Mother:
Matilda Alexander
Household Members Age
Robt J Alexander
37
Matilda Alexander
40
Jackson Alexander
16
Nancy Alexander
14
James J Alexander
12
Samuel C Alexander
10
Rachael E Alexander
8
John T Alexander
6
William H Alexander 3
Granville H Alexander
8/12
Lizabeth Johnsone
63

1900 US Census-Henry is listed with wife and children
Name: Henry Alexander
[Harvey Alexander]
[Henry]
[Henry]
[William Henry]
Age: 33
Birth Date: Oct 1866
Birthplace: Kentucky, USA
Home in 1900: Campton, Wolfe, Kentucky
Sheet Number: 11
Number of Dwelling in Order of Visitation: 196
Family Number: 203
Race: White
Gender: Male
Relation to Head of House: Head
Marital Status: Married
Spouse's Name: Emily Alexander
Marriage Year: 1892
Years Married: 8
Father's Birthplace: Virginia, USA
Mother's Birthplace: Virginia, USA
Occupation: Farmer
Months Not Employed: 0
Can Read: Yes
Can Write: Yes
Can Speak English: Yes
House Owned or Rented: Own
Home Free or Mortgaged: F
Farm or House: F

Household Members Age Relationship
Henry Alexander 33 Head
Emily Alexander
35 Wife
Maude Alexander
5 Daughter
Jesse Alexander
3 Son
Myrtle Alexander
1 Daughter

1910 US Census

Name: William Henry Alexander
Age in 1910: 44
Birth Year: abt 1866
Birthplace: Kentucky
Home in 1910: Campton, Wolfe, Kentucky
Race: White
Gender: Male
Relation to Head of House: Head
Marital Status: Married
Spouse's Name: Emil Alexander
Father's Birthplace: Virginia
Mother's Birthplace: Virginia
Native Tongue: English
Occupation: Farmer
Industry: Home Farm
Employer, Employee or Other: Own Account
Home Owned or Rented: Own
Home Free or Mortgaged: Free
Farm or House: Farm
Able to read: Yes
Able to Write: Yes
Years Married: 18
Out of Work: N
Number of Weeks Out of Work: 0

Household Members Age Relationship
William Henry Alexander 44 Head
Emil Alexander
49 Wife
Maud Alexander
17 Daughter
Jesse Alexander
14 Son
Myrtle Alexander
10 Daughter
Shelby Alexander
8 Son