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Mary Brown — 1940 US Census Record
Model Tree available1940 United States Federal Census · New-Castle-County, Delaware
Our Model Tree links this Mary Brown across the 1920, 1930 and 1940 US Censuses in New-Castle-County, Delaware (XGBoost, ~Confirmed), with identified parents Hugh & Mary — first a spouse (b.~1888), then head of a 3-person household.
Age 52
b. ~1888
Female
Spouse
Born: Delaware
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | New-Castle-County, Delaware |
| Surname | Brown |
| Given Name | Mary M. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Delaware |
| 1935 Residence (City) | Pencader Dist. #8 |
| 1935 Residence (County) | New Castle |
| Additional Details | |
| Hours Worked | 5 |
| Highest Grade | H-2 |
| 1935 Residence | Same place |
| Birth State | Delaware |
| Birth Country | United States |
| Birthplace (normalized) | delaware |
| Township / Ward | Pencader Dist 8 |
| Est. Birth Year | ~1888 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Betty Brown | Daughter | — | 12 | ~1928 |
| Joseph Brown | Head | — | 62 | ~1878 |
| Mary Brown | Spouse | — | 52 | ~1888 |
Census Appearances
1920
New Castle, …
Daughter, age 32
New Castle, Delaware · implied b. ~1888 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brown |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Delaware |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Irish |
| Birth State | Delaware |
| Birth Country | United States |
| Birthplace (normalized) | delaware |
1930
New Castle, …
Daughter, age 43
New Castle, Delaware · implied b. ~1887 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brown |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Delaware |
| Age at First Marriage | 21 |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Occupation | Cigar maker |
| Industry | Cigar Factory |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Delaware |
| Birth Country | United States |
| Birthplace (normalized) | delaware |
1940
New-Castle-County, Delaware
Spouse, age 52
New-Castle-County, Delaware · implied b. ~1888 — 3 household members
| Surname | Brown |
| Given Name | Mary M. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Delaware |
| 1935 Residence (City) | Pencader Dist. #8 |
| 1935 Residence (County) | New Castle |
| Hours Worked | 5 |
| Highest Grade | H-2 |
| 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 Brown across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Hugh Kelley (~0.92 confidence) and mother Mary Kelley (~0.92 confidence) and mother Mary Kelley (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Hugh Kelley
b. ~1860
Source father
● Household
· direct · ~0.92
Mother
Mary Kelley
b. ~1861
Source mother
● Household
· direct · ~0.92
Mother
Mary Kelley
b. ~1855
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Brown
Spouse · 1940 · age 52 · b. ~1888 · Delaware
★ 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 — New-Castle-County, Delaware
Open full size
1940 US Federal Census — New-Castle-County, Delaware
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00546-00150)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Anna L. Jaquette | 35 | Wife | — | Delaware |
| 42 | Thomas Jaquette | 19 | Son | Farm Laborer | Delaware |
| 43 | Edgar Jaquette | 17 | Son | — | Delaware |
| 44 | Elizabeth Jaquette | 11 | Daughter | — | Delaware |
| 45 | David Jaquette | 7 | Son | — | Delaware |
| 46 | Virginia Jaquette | 4 | Daughter | — | Delaware |
| 47 | Willard M. Johnston | 29 | Head | Chemist | Delaware |
| 48 | Margaret N. Johnston | 25 | Wife | — | Delaware |
| 49 | Martin Johnston | 4 | Son | — | Delaware |
| 50 | Joseph Johnston | 60 | Head | Caretaker | Delaware |
| 51 | Elsie M. Johnston | 54 | Wife | — | Delaware |
| 52 | Ruth Johnston | 31 | Daughter | Secretary | Delaware |
| 53 | Edward T. Johnston | 20 | Son | — | Delaware |
| 54 | Robert T. Paquette | 34 | Head | Foreman | Delaware |
| 55 | Ruth B. Paquette | 29 | Wife | — | New York |
| 56 | Jean Paquette | 1 | Daughter | — | Delaware |
| 57 | Joseph F. Brown | 62 | Head | Farmer | Delaware |
| 58 | Mary M. Brown THIS PERSON | 52 | Wife | — | Delaware |
| 59 | Betty Lou Brown | 12 | Daughter | — | Delaware |
| 60 | William Ames Norton | 36 | Head | Carpenter | Pennsylvania |
| 61 | Mary A. Norton | 32 | Wife | — | Pennsylvania |
| 62 | Barry Ames Norton | 12 | Son | — | Delaware |
| 63 | Oscar Starkey | 64 | Head | Farmer | Maryland |
| 64 | Elizabeth Starkey | 59 | Wife | — | Delaware |
| 65 | Anna F. Starkey | 26 | Daughter | Stamper | Delaware |
| 66 | Kathleen Starkey | 18 | Daughter | — | Delaware |
| 67 | Homer Starkey | 35 | Son | Machinist | Delaware |
| 68 | Violet Starkey | 31 | Daughter-in-law | — | Maryland |
| 69 | Doris Starkey | 11 | Granddaughter | — | Delaware |
| 70 | Helen Starkey | 5 | Granddaughter | — | Delaware |
| 71 | Virginia Starkey | 2 | Granddaughter | — | Delaware |
| 72 | Atwood Johnston | 70 | Head | Farmer | Delaware |
| 73 | Margaret E. Johnston | 54 | Wife | — | Delaware |
| 74 | John C. Johnston | 28 | Son | Accountant | Delaware |
| 75 | John Vansant | 69 | Boarder | Farm Laborer | Maryland |
| 76 | Fred G. Ferguson | 32 | Head | Farm Laborer | Pennsylvania |
| 77 | Helen Ferguson | 30 | Wife | House Maid | Delaware |
| 78 | Edna B. Lamborn | 52 | Mother-in-law | — | Pennsylvania |
| 79 | Warren C. Lamborn | 17 | Brother-in-law | — | Delaware |
| 80 | Edna S. Chalmers | 57 | Head | — | Illinois |
Pedigree Summary
Mary
Gen 1 · 3 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)