MM
Mary Mcdowell — 1940 US Census Record
Linked across censuses1940 United States Federal Census · New-Castle-County, Delaware
Our Model Tree links this Mary Mcdowell across the 1930 and 1940 US Censuses in New-Castle-County, Delaware (XGBoost, ~Confirmed) — first a daughter (b.~1927), then head of a 11-person household.
Age 13
b. ~1927
Female
Daughter
Born: Delaware
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | New-Castle-County, Delaware |
| Surname | McDowell |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Delaware |
| 1935 Residence (City) | Unincorporated place: Brooklynn Terrace |
| 1935 Residence (County) | New Castle |
| Additional Details | |
| Highest Grade | 6 |
| 1935 Residence | Same place |
| Birth State | Delaware |
| Birth Country | United States |
| Birthplace (normalized) | delaware |
| Township / Ward | Unincorporated Place Brooklynn Terrace |
| Est. Birth Year | ~1927 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Joanne Mcdowell | Daughter | — | 8 | ~1932 |
| William Mcdowell | Head | — | 44 | ~1896 |
| Mary Mcdowell | Daughter | — | 13 | ~1927 |
| Wilma Mcdowell | Daughter | — | 1 | ~1939 |
| Freda Mcdowell | Spouse | — | 38 | ~1902 |
| William Williamson | Other | — | 37 | ~1903 |
| Edythe Mcdowell | Daughter | — | 20 | ~1920 |
| Walter Mcdowell | Son | — | 10 | ~1930 |
| James Mcdowell | Son | — | 6 | ~1934 |
| Nelson Mcdowell | Son | — | 15 | ~1925 |
| Elaine Mcdowell | Daughter | — | 16 | ~1924 |
Census Appearances
1930
New Castle, …
Daughter, age 2
New Castle, Delaware · implied b. ~1928 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDowell |
| Given Name | Mary J |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Delaware |
| Father's Birthplace | Delaware |
| Mother's Birthplace | Delaware |
| Birth State | Delaware |
| Birth Country | United States |
| Birthplace (normalized) | delaware |
1940
New-Castle-County, Delaware
Daughter, age 13
New-Castle-County, Delaware · implied b. ~1927 — 11 household members
| Surname | McDowell |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Delaware |
| 1935 Residence (City) | Unincorporated place: Brooklynn Terrace |
| 1935 Residence (County) | New Castle |
| Highest Grade | 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 Mcdowell across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Mcdowell
Daughter · 1940 · age 13 · b. ~1927 · Delaware
★ You are viewing this record
Sibling
Wilma Mcdowell
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joanne Mcdowell
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Nelson Mcdowell
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Walter Mcdowell
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edythe Mcdowell
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Mcdowell
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elaine Mcdowell
Sibling · 1940 · age 16
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 — 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-t0627-00545-00643)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Arthur Faulkner | 50 | brother | Folder | No. Ireland |
| 2 | James Faulkner | 20 | son | Clerk | Delaware |
| 3 | Bernice Faulkner | 18 | daughter | — | Delaware |
| 4 | Joan Faulkner | 14 | daughter | — | Delaware |
| 5 | Elizabeth Faulkner | 11 | daughter | — | Delaware |
| 6 | Dorothy Faulkner | 18 | niece | — | Delaware |
| 7 | Ellsworth K. Ellingsworth | 30 | Head | Chemist | Wisconsin |
| 8 | Helen B. Ellingsworth | 30 | Wife | — | Virginia |
| 9 | James Ellingsworth | 5 | son | — | Delaware |
| 10 | Richard Ellingsworth | 3 | son | — | Delaware |
| 11 | William P. Grier | 44 | Head | Plumber | Penna |
| 12 | Wilhelmina Grier | 38 | Wife | — | Penna |
| 13 | Mildred Grier | 20 | daughter | Clerk | Penna |
| 14 | Gerald Grier | 14 | son | — | Delaware |
| 15 | Ruth Grier | 12 | daughter | — | Delaware |
| 16 | Sara Grier | 8 | daughter | — | Delaware |
| 17 | Laura Marple | 30 | sister-in-law | Saleslady | Penna |
| 18 | Francis Kersatzy | 24 | Head | Asst. Chemist | Penna |
| 19 | Margaret R. Kersatzy | 21 | Wife | — | Illinois |
| 20 | Peter F. Kersatzy | 5 | son | — | Delaware |
| 21 | Marvin F. Horner | 44 | Head | Guard | Maryland |
| 22 | Rebecca B. Horner | 45 | Wife | — | Delaware |
| 23 | Marvin F. Jr. Horner | 19 | son | Clerk | Delaware |
| 24 | Lester L. Schneiss | 31 | Head | Chemist | Illinois |
| 25 | Doris J. Schneiss | 30 | Wife | — | Illinois |
| 26 | William Mcdowell | 44 | Head | Bricklayer | Delaware |
| 27 | Freda G. Mcdowell | 38 | Wife | — | Delaware |
| 28 | Edythe Mcdowell | 20 | daughter | — | Delaware |
| 29 | Elaine Mcdowell | 16 | daughter | — | Delaware |
| 30 | Nelson Mcdowell | 15 | son | — | Delaware |
| 31 | Mary Mcdowell THIS PERSON | 13 | daughter | — | Delaware |
| 32 | Walter Mcdowell | 10 | son | — | Delaware |
| 33 | Joanne Mcdowell | 8 | daughter | — | Delaware |
| 34 | James Mcdowell | 6 | son | — | Delaware |
| 35 | Wilma Mcdowell | 1 | daughter | — | Delaware |
| 36 | William Williamson | 37 | lodger | Operator | Penna |
| 37 | J. Felix Elliott | 30 | Head | Clerk | Delaware |
| 38 | Nellie Elliott | 28 | Wife | — | Delaware |
| 39 | Joseph P. Elliott | 36 | brother | Clerk | Delaware |
| 40 | Morton R. Baldwin | 44 | Head | Guard | Delaware |
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)