MD
Mamie Davis — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Nassau-County, New York
Our Model Tree links this Mamie Davis across the 1930 and 1940 US Censuses in Nassau-County, New York (XGBoost, ~Confirmed) — first a daughter (b.~1920), then head of a 7-person household.
Age 20
b. ~1920
Female
Daughter
Born: Florida
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Nassau-County, New York |
| Surname | Davis |
| Given Name | Mamie |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | Black |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Florida |
| 1935 Residence (City) | Inwood |
| 1935 Residence (County) | Nassau |
| Additional Details | |
| Occupation | secretary |
| Industry | Community Center |
| Class of Worker | GW |
| Hours Worked | 20 |
| Income (1939) | 216 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same house |
| Birth State | Florida |
| Birth Country | United States |
| Birthplace (normalized) | florida |
| Occupation | Secretary |
| Township / Ward | Inwood |
| Est. Birth Year | ~1920 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mamie | Age | Birth yr |
|---|---|---|---|---|
| Mamie Davis | Daughter | — | 20 | ~1920 |
| William Davis | Son | — | 12 | ~1928 |
| Thomas Davis | Head | — | 73 | ~1867 |
| James Davis | Son | — | 24 | ~1916 |
| Ida Davis | Spouse | — | 47 | ~1893 |
| Maxine Davis | Daughter | — | 15 | ~1925 |
| Gloria Davis | Daughter | — | 8 | ~1932 |
Census Appearances
1930
Nassau, New …
Other, age 10
Nassau, New York · implied b. ~1920 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davis |
| Given Name | Mamie |
| Sex | F |
| Color / Race | Black |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Florida |
| Father's Birthplace | Georgia |
| Mother's Birthplace | Georgia |
| Can Read/Write | Yes |
| Birth State | Florida |
| Birth Country | United States |
| Birthplace (normalized) | florida |
1940
Nassau-County, New …
Daughter, age 20
Nassau-County, New York · implied b. ~1920 — 7 household members
| Surname | Davis |
| Given Name | Mamie |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | Black |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Florida |
| 1935 Residence (City) | Inwood |
| 1935 Residence (County) | Nassau |
| Occupation | secretary |
| Industry | Community Center |
| Class of Worker | GW |
| Hours Worked | 20 |
| Income (1939) | 216 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same house |
| Birth State | Florida |
| Birth Country | United States |
| Birthplace (normalized) | florida |
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 Mamie Davis across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mamie Davis
Daughter · 1940 · age 20 · b. ~1920 · New York
★ You are viewing this record
Sibling
Gloria Davis
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Davis
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Maxine Davis
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Davis
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Nassau-County, New York
Open full size
1940 US Federal Census — Nassau-County, New York
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02690-00512)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Thomas Di Gangi | 26 | son | Painter | New York |
| 2 | Harry Di Gangi | 23 | son | Shipping Clerk | New York |
| 3 | Charles Di Gangi | 18 | son | Messenger | New York |
| 4 | Frank Di Gangi | 13 | son | — | New York |
| 5 | Patricia Di Gangi | 12 | daughter | — | New York |
| 6 | Elmer Parker | 39 | head | Mailman | New Jersey |
| 7 | Marion Parker | 36 | wife | Elevator Operator | New Jersey |
| 8 | Jack Walker | 52 | lodger | Laborer | Texas |
| 9 | Gilbert Walker | 45 | lodger | Presser | Texas |
| 10 | Casper Mccarty | 42 | head | Carpenter | Georgia |
| 11 | Keble Mccarty | 39 | wife | Laundress | Georgia |
| 12 | Charles Oliver | 29 | head | Presser | North Carolina |
| 13 | Marie Oliver | 21 | wife | — | North Carolina |
| 14 | Shirley Oliver | 3 | daughter | — | New York |
| 15 | Minnie Knight | 19 | lodger | House Maid | Virginia |
| 16 | Katherine Parker | 30 | lodger | House Maid | West Virginia |
| 17 | Dora Marchant | 52 | head | House Maid | South Carolina |
| 18 | George Bryant | 23 | lodger | Cook | North Carolina |
| 19 | Ida Bryant | 22 | lodger | Secretary | North Carolina |
| 20 | Blazer Ferguson | 50 | head | Laborer | South Carolina |
| 21 | Carrie Ferguson | 49 | wife | Laundress | South Carolina |
| 22 | Marie Windom | 50 | lodger | — | South Carolina |
| 23 | James Stinger | 45 | head | Foreman | Washington D.C. |
| 24 | Sarah Stinger | 41 | wife | — | Georgia |
| 25 | James Jr. Stinger | 13 | son | — | New York |
| 26 | Carrie Ford | 49 | sister in law | House Maid | Georgia |
| 27 | Edithe Ford | 19 | niece | — | New York |
| 28 | Benjamin Lawrence | 39 | head | Truck Driver | South Carolina |
| 29 | Elsie Lawrence | 37 | wife | Cook | South Carolina |
| 30 | Clarence Thomas | 43 | head | Chauffeur | Kentucky |
| 31 | Juanita Thomas | 25 | wife | Laundress | Virginia |
| 32 | Thomas Davis | 73 | head | — | Georgia |
| 33 | Ida Davis | 47 | wife | Laundress | Georgia |
| 34 | James Davis | 24 | son | Painter | Florida |
| 35 | Mamie Davis THIS PERSON | 20 | daughter | Secretary | Florida |
| 36 | Maxine Davis | 15 | daughter | — | New York |
| 37 | William Davis | 12 | son | — | New York |
| 38 | Gloria Davis | 8 | daughter | — | New York |
| 39 | Ophelia Friedman | 60 | head | Laundress | Georgia |
| 40 | Warren Miller | 41 | lodger | Chauffeur | Georgia |
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)