MD
Mary Davidson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Sussex-County, Delaware
Our Model Tree links this Mary Davidson across the 1900, 1910, 1920, 1930 and 1940 US Censuses in Sussex-County, Delaware (XGBoost, ~Confirmed) — first a spouse (b.~1863), then head of a 4-person household.
Age 77
b. ~1863
Female
Spouse
Born: Delaware
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Sussex-County, Delaware |
| Surname | Davidson |
| Given Name | Mary C. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 77 |
| Marital Status | Married |
| Birthplace | Delaware |
| 1935 Residence (City) | 10th Rep. District |
| 1935 Residence (County) | Sussex |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Delaware |
| Birth Country | United States |
| Birthplace (normalized) | delaware |
| Township / Ward | 10Th Rep District |
| Est. Birth Year | ~1863 |
Household Members
Census records only state relationship to the household head.
Pairwise kinship is derived (~90–95% accurate), not recorded.
Step/blended families and boarders can break it.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Albert Davidson | Head | — | 80 | ~1860 |
| Albert Davidson | Son | — | 27 | ~1913 |
| Harry Davidson | Son | — | 58 | ~1882 |
| Mary Davidson | Spouse | — | 77 | ~1863 |
Census Appearances
1900
Sussex, Delaware
Spouse, age 42
Sussex, Delaware · implied b. ~1858 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davidson |
| Given Name | Mary P. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Delaware |
| Birth Month | Sept |
| Birth Year | 1858 |
| Father's Birthplace | Delaware |
| Mother's Birthplace | Delaware |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Delaware |
| Birth Country | United States |
| Birthplace (normalized) | delaware |
1910
Sussex, Delaware
Spouse, age 51
Sussex, Delaware · implied b. ~1859 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davidson |
| Given Name | Mary E. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Delaware |
| Years Married | 28 |
| Children Born | 2 |
| Children Living | 1 |
| Father's Birthplace | Delaware |
| Mother's Birthplace | Delaware |
| Occupation | Farm |
| Industry | at home |
| Birth State | Delaware |
| Birth Country | United States |
| Birthplace (normalized) | delaware |
1920
Sussex, Delaware
Spouse, age 61
Sussex, Delaware · implied b. ~1859 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davidson |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 61 |
| Marital Status | Married |
| Birthplace | Delaware |
| Father's Birthplace | Delaware |
| Mother's Birthplace | Delaware |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Delaware |
| Birth Country | United States |
| Birthplace (normalized) | delaware |
1930
Sussex, Delaware
Other, age 66
Sussex, Delaware · implied b. ~1864 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davidson |
| Given Name | Mary |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 66 |
| Marital Status | Married |
| Birthplace | Delaware |
| Age at First Marriage | 16 |
| Father's Birthplace | Delaware |
| Mother's Birthplace | Delaware |
| Can Read/Write | Yes |
| Birth State | Delaware |
| Birth Country | United States |
| Birthplace (normalized) | delaware |
1940
Sussex-County, Delaware
Spouse, age 77
Sussex-County, Delaware · implied b. ~1863 — 4 household members
| Surname | Davidson |
| Given Name | Mary C. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 77 |
| Marital Status | Married |
| Birthplace | Delaware |
| 1935 Residence (City) | 10th Rep. District |
| 1935 Residence (County) | Sussex |
| Income (1939) | 0 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Delaware |
| Birth Country | United States |
| Birthplace (normalized) | delaware |
Model Tree
An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Our Model Tree links Mary Davidson across 5 US Census years (1900, 1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Davidson
Spouse · 1940 · age 77 · b. ~1863 · Delaware
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Sussex-County, Delaware
Open full size
1940 US Federal Census — Sussex-County, Delaware
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00548-00643)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Walter H. Lash | 51 | Head | Labour | Delaware |
| 42 | Bertha M. Lash | 48 | Wife | — | Delaware |
| 43 | Thelma Lash | 20 | Daughter | Secretary | Delaware |
| 44 | Calvin Warrington | 17 | Lodger | — | Delaware |
| 45 | Sara A. Loockerman | 63 | Head | — | Ireland |
| 46 | Sara E. Loockerman | 37 | Daughter | Clerk | New York |
| 47 | Layton D. Loockerman | 31 | Head | Bridge Operator | Delaware |
| 48 | Lola M. Loockerman | 30 | Wife | — | Delaware |
| 49 | Robert L. Loockerman | 10 | Son | — | Delaware |
| 50 | Margaret Ann Loockerman | 8 | Daughter | — | Delaware |
| 51 | George L. Loockerman | 7 | Son | — | Delaware |
| 52 | Clarence Card | 42 | Head | Laborer | Delaware |
| 53 | Rodell Card | 44 | Brother | Laborer | Delaware |
| 54 | Edward P. Millman | 30 | Head | Laborer | Delaware |
| 55 | Nellie Millman | 32 | Wife | — | Delaware |
| 56 | Preston E. Millman | 3 | Son | — | Delaware |
| 57 | Mary Willey | 85 | Lodger | — | Delaware |
| 58 | De Verne V. Doty | 49 | Head | Laborer | Penna. |
| 59 | Katharine Doty | 40 | Wife | — | Penna. |
| 60 | Bobby J. Doty | 6 | Son | — | Delaware |
| 61 | S. Giles | 72 | Father | Laborer | Wisconsin |
| 62 | Charles W. Covington | 60 | Head | Laborer | Indiana |
| 63 | Gladys Covington | 16 | Daughter | — | Delaware |
| 64 | Lew T. White | 41 | Head | Dealer | Penna. |
| 65 | Mary A. White | 46 | Wife | — | Texas |
| 66 | Betty Lou White | 16 | Daughter | — | New Jersey |
| 67 | Betsy Mary White | 14 | Daughter | — | New Jersey |
| 68 | Lew T. Jr. White | 12 | Son | — | New Jersey |
| 69 | Beatrice C. White | 10 | Daughter | — | Delaware |
| 70 | Flywella White | 8 | Daughter | — | Delaware |
| 71 | John E. White | 79 | Father | — | Penna. |
| 72 | Albert C. Davidson | 80 | Head | Ship Building | Delaware |
| 73 | Mary C. Davidson THIS PERSON | 77 | Wife | — | Delaware |
| 74 | Harry Davidson | 58 | Son | Carpenter | Delaware |
| 75 | Albert Davidson | 27 | Son | Laborer | New Jersey |
| 76 | Arthur B. Campbell | 58 | Head | Carpenter | Delaware |
| 77 | Virginia Campbell | 53 | Wife | — | Delaware |
| 78 | John Hitch | 48 | Head | Laborer | Delaware |
| 79 | Dorothy L. Hitch | 29 | Wife | — | Delaware |
| 80 | William Vaughn | 32 | Head | Labour | Mississippi |
Related Census Records
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 United States Federal Census (NARA). Our Model Tree links this person across census decades using XGBoost-based record linkage, with per-link confidence scores. Household corroboration strengthens the signal when co-residents appear on the same census pages in multiple years.
Source: National Archives and Records Administration (NARA)