DB
David Brown — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this David Brown across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Florence & Lester — first a son (b.~1917), then head of a 3-person household.
Age 23
b. ~1917
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Brown |
| Given Name | David E. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Marlboro |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Industry | S |
| Highest Grade | C 3 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Marlboro |
| Est. Birth Year | ~1917 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to David | Age | Birth yr |
|---|---|---|---|---|
| Ralph Brown | Head | — | 38 | ~1902 |
| David Brown | Son | — | 23 | ~1917 |
| Florence Brown | Spouse | — | 58 | ~1882 |
Census Appearances
1920
Essex, Massachusetts
Son, age 2
Essex, Massachusetts · implied b. ~1918 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brown |
| Given Name | David |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Essex, Massachusetts
Son, age 12
Essex, Massachusetts · implied b. ~1918 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brown |
| Given Name | David J. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Son, age 23
Middlesex-County, Massachusetts · implied b. ~1917 — 3 household members
| Surname | Brown |
| Given Name | David E. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Marlboro |
| 1935 Residence (County) | Middlesex |
| Industry | S |
| Highest Grade | C 3 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
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 David Brown across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Florence Brown (~0.92 confidence) and father Lester Brown (~0.92 confidence) and mother Margaret Brown (~0.92 confidence) and father David Brown (~0.92 confidence) and mother Alberta Brown (~0.92 confidence) and father Ralph Brown (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Florence Brown
b. ~1882
Source mother
● Household
· direct · ~0.92
Father
Lester Brown
b. ~1885
Source father
● Household
· direct · ~0.92
Mother
Margaret Brown
b. ~1891
Source mother
● Household
· direct · ~0.92
Father
David Brown
b. ~1896
Source father
● Household
· direct · ~0.92
Mother
Alberta Brown
b. ~1898
Source mother
● Household
· direct · ~0.92
Father
Ralph Brown
b. ~1902
Source father
● Household
· direct · ~0.92
This person
Anchor record
David Brown
Son · 1940 · age 23 · b. ~1917 · Massachusetts
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Middlesex-County, Massachusetts
Open full size
1940 US Federal Census — Middlesex-County, Massachusetts
Page Contents
18 people indexed on this census page (nara:1940:m-t0627-01619-00874)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Walter C. Borne | 49 | head | Trucker | Virginia |
| 42 | Josephine Borne | 45 | wife | — | Mass |
| 43 | Jane Borne | 18 | dau | — | Virginia |
| 44 | Josephine Borne | 10 | dau | — | Virginia |
| 45 | Walter Jr. Borne | 16 | son | — | Virginia |
| 46 | Joseph Cunningham | 46 | head | Police Lieutenant | Mass |
| 47 | Ellen Cunningham | 45 | wife | — | Mass |
| 48 | Connors Michael | 73 | Father | — | Mass |
| 49 | Helen M. Smith | 34 | wife | Bookkeeper | Mass |
| 50 | Paul D. Merrill | 49 | Head | Manager | Massachusetts |
| 51 | Winifred Merrill | 47 | Wife | — | New Hampshire |
| 52 | Patricia Merrill | 10 | Daughter | — | Massachusetts |
| 55 | Barbara Randall | 23 | Lodger | Artist | Massachusetts |
| 56 | Ralph E. Brown | 38 | head | Orchardist | Maine |
| 57 | Florence M. Brown | 58 | wife | — | Massachusetts |
| 58 | David E. Brown THIS PERSON | 23 | son | — | Massachusetts |
| 59 | Dominic E. Connors | 73 | head | — | Massachusetts |
| 60 | Esther M. Connors | 35 | daughter | — | Massachusetts |
Pedigree Summary
David
Gen 1 · 6 parents
~0.92
Max depth 4 (1900–1950 window)
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)