MF
Mary Fitzpatrick — 1940 US Census Record
Linked across censuses1940 United States Federal Census · District-Of-Columbia-County, District of Columbia
Our Model Tree links this Mary Fitzpatrick across the 1930 and 1940 US Censuses in District-Of-Columbia-County, District of Columbia (XGBoost, ~Confirmed) — first a daughter (b.~1928), then head of a 10-person household.
Age 12
b. ~1928
Female
Daughter
Born: D.C.
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | District-Of-Columbia-County, District of Columbia |
| Surname | Fitzpatrick |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | D.C. |
| 1935 Residence (City) | New Castle |
| 1935 Residence (County) | New Castle |
| Additional Details | |
| Highest Grade | G 5 |
| 1935 Residence | Pennsylvania |
| Birth State | District of Columbia |
| Birth Country | United States |
| Birthplace (normalized) | dc |
| Township / Ward | Washington |
| Est. Birth Year | ~1928 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Eileen Fitzpatrick | Daughter | — | 16 | ~1924 |
| Elizabeth Fitzpatrick | Daughter | — | 18 | ~1922 |
| Rita Fitzpatrick | Daughter | — | 9 | ~1931 |
| Joan Fitzpatrick | Daughter | — | 14 | ~1926 |
| Mary Fitzpatrick | Daughter | — | 12 | ~1928 |
| John Fitzpatrick | Head | — | 53 | ~1887 |
| Leo Fitzpatrick | Son | — | 7 | ~1933 |
| John Fitzpatrick | Son | — | 21 | ~1919 |
| Hugh Fitzpatrick | Son | — | 19 | ~1921 |
| Elizabeth Fitzpatrick | Spouse | — | 49 | ~1891 |
Census Appearances
1930
None, District …
Daughter, age 2
None, District of Columbia · implied b. ~1928 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Fitzpatrick |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | D.C. |
| Father's Birthplace | Md |
| Mother's Birthplace | Minn |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | District of Columbia |
| Birth Country | United States |
| Birthplace (normalized) | dc |
1940
District-Of-Columbia-County, District …
Daughter, age 12
District-Of-Columbia-County, District of Columbia · implied b. ~1928 — 10 household members
| Surname | Fitzpatrick |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | D.C. |
| 1935 Residence (City) | New Castle |
| 1935 Residence (County) | New Castle |
| Highest Grade | G 5 |
| 1935 Residence | Pennsylvania |
| Birth State | District of Columbia |
| Birth Country | United States |
| Birthplace (normalized) | dc |
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 Fitzpatrick across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Fitzpatrick
Daughter · 1940 · age 12 · b. ~1928 · District of Columbia
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Sibling
Rita Fitzpatrick
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Hugh Fitzpatrick
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Fitzpatrick
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Fitzpatrick
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joan Fitzpatrick
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leo Fitzpatrick
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eileen Fitzpatrick
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 — District-Of-Columbia-County, District of Columbia
Open full size
1940 US Federal Census — District-Of-Columbia-County, District of Columbia
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00569-00894)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Rita Maria Eichhorn | 7 | Daughter | — | D.C. |
| 42 | Mary Anne Eichhorn | 5 | Daughter | — | D.C. |
| 43 | Louis Cecelia Eichhorn | 4 | Daughter | — | D.C. |
| 44 | Edward F. Layton | 44 | Head | Mail Clerk | Virginia |
| 45 | Annie Mae Layton | 37 | Wife | — | Maryland |
| 46 | Mildred Ann Layton | 7 | Daughter | — | D.C. |
| 47 | Annie Mae Mitchell | 17 | Daughter | — | D.C. |
| 48 | John J. Keefe | 58 | Head | Foreman | D.C. |
| 49 | Josephine M. Keefe | 60 | Wife | — | Maryland |
| 50 | Joseph R. Sears | 44 | Head | Paper Hanger | Maryland |
| 51 | Agnes M. Sears | 42 | Wife | Binding Operator | New Jersey |
| 52 | John R. Sears | 21 | Son | Paper Hanger | D.C. |
| 53 | Marvin J. Sears | 16 | Son | — | D.C. |
| 54 | Earl V. Sears | 14 | Son | — | D.C. |
| 55 | Archie Wyman | 45 | Head | Carpenter | Massachusetts |
| 56 | Octavia Wyman | 49 | Wife | Draftsman | New York |
| 57 | Ernest J. Wyman | 20 | Son | Truck Driver | Maryland |
| 58 | Harry L. Wyman | 16 | Son | — | D.C. |
| 59 | Michael Wyman | 16 | Son | — | D.C. |
| 60 | Irene M. Wyman | 13 | Daughter | — | D.C. |
| 61 | Bonnie Ford | 70 | Aunt | — | New York |
| 62 | John H. Fitzpatrick | 53 | Head | Electrical Engineer | Maryland |
| 63 | Elizabeth Fitzpatrick | 49 | Wife | — | Minnesota |
| 64 | John Fitzpatrick | 21 | Son | — | North Dakota |
| 65 | Hugh Fitzpatrick | 19 | Son | — | Pennsylvania |
| 66 | Elizabeth Fitzpatrick | 18 | Daughter | — | Pennsylvania |
| 67 | Eileen Fitzpatrick | 16 | Daughter | — | Pennsylvania |
| 68 | Joan Fitzpatrick | 14 | Daughter | — | Pennsylvania |
| 69 | Mary Fitzpatrick THIS PERSON | 12 | Daughter | — | D.C. |
| 70 | Rita Fitzpatrick | 9 | Daughter | — | Pennsylvania |
| 71 | Leo Fitzpatrick | 7 | Son | — | Ohio |
| 72 | Carl Sullins | 44 | Head | Printer | South Carolina |
| 73 | Murdaugh Sullins | 43 | Wife | — | South Carolina |
| 74 | Carl Jr. Sullins | 19 | Son | — | South Carolina |
| 75 | John M. Triay | 49 | Head | Clerk | Louisiana |
| 76 | Florence W. Triay | 48 | Wife | — | Louisiana |
| 77 | Bert J. Maurice | 44 | Head | Machinist | Indiana |
| 78 | Jania Maurice | 40 | Wife | — | South Carolina |
| 79 | Adelaide Adams | 20 | Daughter | — | North Carolina |
| 80 | Martha Adams | 17 | Daughter | — | North Carolina |
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)