per june 2018 email from Gail Buckingham Credit (via Bil Chen):
“My grandfather and his younger brother (the youngest of them all), William, married sisters, Lillian and Caroline “Carrie” Morgan, and they all moved to Michigan (Detroit)
“My grandparents had two children, a daughter, Dolores, and my father, Harry Morgan Buckingham. William and Caroline had two sons, Glen and William “Bill.”
“My father married my mother, Mildred Elizabeth “Liz” Deupree, in 1947, and there were four of us kids: Glenn Edward (b 1949, d 2015), Gail Lisbeth (me) (b 1951), Harry David (b 1954, d 2003) and Barbara Jo (b 1956). I’m married to Frank Credit, and we have three daughters, Kalli, Stacey and Lindsay, and eight grandchildren

1930FCI United States Federal Census Michigan Wayne Detroit (Districts 1-250) District 0105 image 2 of 29 @ancestry; Source Citation: Year: 1930; Census Place: Detroit, Wayne, Michigan; Page: 2A; Enumeration District: 0105; FHL microfilm: 2340770
Source Information: Ancestry.com. 1930 United States Federal Census [database on-line]. Provo, UT, USA: Ancestry.com Operations Inc, 2002.
Name: Mildred E Deupree
Birth Year: abt 1929
[abt 1928]
Gender: Female
Race: White
Birthplace: Michigan
Marital status: Single
Relation to Head of House: Daughter
Home in 1930: Detroit, Wayne, Michigan, USA
Map of Home: View Map
Street address: Milwaukee West
Ward of City: FOURTH
Block: 51
House Number: 818
Dwelling Number: 11
Family Number: 31
Attended School: No
Father's Birthplace: Alabama
Mother's Birthplace: Arkansas
Household Members:
Name Age
James E Deupree 33 b Alabama
Alva V Deupree 24 b Arkansas
Herman E Deupree 4
Mildred E Deupree 1

1940FCI United States Federal Census Michigan Wayne Detroit 84-1569; image 28 of 28 @ancestry; Source Citation: Year: 1940; Census Place: Detroit, Wayne, Michigan; Roll: m-t0627-01888; Page: 63B; Enumeration District: 84-1569
Source Information: Ancestry.com. 1940 United States Federal Census [database on-line]. Provo, UT, USA: Ancestry.com Operations, Inc., 2012.
Name: Mildred Deupree
Age: 11; Est birth year: abt 1929; Birthplace: Michigan
Gender: Female; Race: White
Marital status: Single
Relation to Head of House: Daughter
Home in 1940: Detroit, Wayne, Michigan
Map of Home in 1940: View Map
Street: Sussex
House Number: 14557
Inferred Residence in 1935: Detroit, Wayne, Michigan
Residence in 1935: Same Place
Sheet Number: 63B
Attended School or College: Yes
Highest Grade Completed: Elementary school, 5th grade
Household Members:
James E Deupree 42
Alva Deupree 34
Edward Deupree 14
Mildred Deupree 11

MARR Michigan, Marriage Records, 1867-1952
Source Citation: Michigan Department of Community Health, Division of Vital Records and Health Statistics; Lansing, MI, USA; Michigan, Marriage Records, 1867-1952; Film: 351; Film Description: Wayne (Dates TBD)
Source Information: Ancestry.com. Michigan, Marriage Records, 1867-1952 [database on-line]. Provo, UT, USA: Ancestry.com Operations, Inc., 2015.
Original data: Michigan, Marriage Records, 1867–1952. Michigan Department of Community Health, Division for Vital Records and Health Statistics.
Name: Harry Morgan Buckingham
Gender: Male; Race: White
Age: 20; Birth Year: abt 1927; Birth Place: Detroit, Michigan
Father: Harry L Buckingham
Mother: Lillian Morgan
License County: Wayne
Marriage Date: 6 Sep 1947
Marriage Place: Detroit, Wayne, Michigan, USA
Residence Place: Detroit, Michigan
Spouse: Mildred Elizabeth Deupree
Gender: Female; Race: White
Age: 16; Birth Year: abt 1931; Birth Place: Detroit, Michigan
Father: James F Deupree
Mother: Alva Bailey
County File Number: 714191
State File Number: 394397

U.S., Social Security Applications and Claims Index, 1936-2007 @ancestry
Source Information: Ancestry.com. U.S., Social Security Applications and Claims Index, 1936-2007 [database on-line]. Provo, UT, USA: Ancestry.com Operations, Inc., 2015.
Original data: Social Security Applications and Claims, 1936-2007.
Name: Mildred Elizabeth Deupree
[Mildred Elizabeth Buckingham]
[M Liz Buckingham]
Gender: Female; Race: White
Birth Date: 11 Oct 1928
Birth Place: Detroit Wayn, Michigan
Death Date: 24 Jun 2006
Father: James E Deupree
Mother: Alva V Bailey
SSN: 376240157
Notes: Aug 1943: Name listed as MILDRED ELIZABETH DEUPREE; Sep 1947: Name listed as MILDRED ELIZABETH BUCKINGHAM; 11 Jul 2006: Name listed as M LIZ BUCKINGHAM