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Mary Brennan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · York-County, Maine
Our Model Tree links this Mary Brennan across the 1930 and 1940 US Censuses in York-County, Maine (XGBoost, ~Confirmed) — first a daughter (b.~1925), then head of a 10-person household.
Age 15
b. ~1925
Female
Daughter
Born: Maine
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | York-County, Maine |
| Surname | Brennan |
| Given Name | Mary F. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Maine |
| 1935 Residence (City) | No Kennebunkport |
| 1935 Residence (County) | York |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
| Township / Ward | No Kennebunkport |
| Est. Birth Year | ~1925 |
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 |
|---|---|---|---|---|
| Mildred Brennan | Daughter | — | 4 | ~1936 |
| Wilma Brennan | Daughter | — | 7 | ~1933 |
| Mary Brennan | Daughter | — | 15 | ~1925 |
| Evelyn Brennan | Daughter | — | 9 | ~1931 |
| Nora Brennan | Daughter | — | 8 | ~1932 |
| Kathaline Brennan | Daughter | — | 13 | ~1927 |
| William Brennan | Head | — | 34 | ~1906 |
| Robert Brennan | Son | — | 11 | ~1929 |
| Charles Brennan | Son | — | 6 | ~1934 |
| Grace Brennan | Spouse | — | 34 | ~1906 |
Census Appearances
1930
York, Maine
Daughter, age 5
York, Maine · implied b. ~1925 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brennan |
| Given Name | Mary F |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Maine |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Maine |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
1940
York-County, Maine
Daughter, age 15
York-County, Maine · implied b. ~1925 — 10 household members
| Surname | Brennan |
| Given Name | Mary F. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Maine |
| 1935 Residence (City) | No Kennebunkport |
| 1935 Residence (County) | York |
| Class of Worker | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
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 Brennan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Brennan
Daughter · 1940 · age 15 · b. ~1925 · Maine
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Sibling
Nora Brennan
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Brennan
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kathaline Brennan
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mildred Brennan
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Evelyn Brennan
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Brennan
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Wilma Brennan
Sibling · 1940 · age 7
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 — York-County, Maine
Open full size
1940 US Federal Census — York-County, Maine
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01496-00501)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Vernon Lucas | 13 | Step son | — | Maine |
| 42 | Ezra Mitchell | 57 | Head | Farmer | Maine |
| 43 | Mabel Mitchell | 58 | Wife | — | Maine |
| 44 | Henry F. Sinnott | 52 | Head | Farmer | Maine |
| 45 | Alice Sinnott | 43 | Wife | — | Massachusetts |
| 46 | Homer Strope | 61 | Hiredman | Farmer | Vermont |
| 47 | J. W. Merrill | 77 | Head | — | Maine |
| 48 | Percy Merrill | 39 | Head | Farmer | Massachusetts |
| 49 | Edith Merrill | 39 | Wife | — | Massachusetts |
| 50 | Jefferson Merrill | 17 | Son | — | Maine |
| 51 | Fred Merrill | 15 | Son | — | Maine |
| 52 | Mary Louise Merrill | 10 | Daughter | — | Maine |
| 53 | Bertram Seehusen | 33 | Head | Chopper | Massachusetts |
| 54 | Irene Seehusen | 33 | Wife | — | England |
| 55 | Bertram Seehusen | 4 | Son | — | Maine |
| 56 | Robert Seehusen | 3 | Son | — | Maine |
| 57 | Howard R. Hill | 48 | Head | Agent | Maine |
| 58 | Gladys Hill | 47 | Sister | Teacher | Massachusetts |
| 59 | Georgina Brown | 45 | Head | — | Maine |
| 60 | Elmore Brown | 18 | Son | — | Maine |
| 61 | Francis Brown | 15 | Son | — | Maine |
| 62 | Wilford Brown | 13 | Son | — | Maine |
| 63 | Carl Brown | 10 | Son | — | Maine |
| 64 | Celia Brown | 10 | Daughter | — | Maine |
| 65 | William Brennan | 34 | Head | Gardner | Massachusetts |
| 66 | Grace Brennan | 34 | Wife | — | Maine |
| 67 | Mary F. Brennan THIS PERSON | 15 | Daughter | — | Maine |
| 68 | Kathaline Brennan | 13 | Daughter | — | Maine |
| 69 | Robert Brennan | 11 | Son | — | Maine |
| 70 | Evelyn Brennan | 9 | Daughter | — | Maine |
| 71 | Nora Brennan | 8 | Daughter | — | Maine |
| 72 | Wilma Brennan | 7 | Daughter | — | Maine |
| 73 | Charles J Brennan | 6 | Son | — | Maine |
| 74 | Mildred Brennan | 4 | Daughter | — | Maine |
| 75 | Ellwyn Houston | 36 | Head | Proprietor | Maine |
| 76 | Dorothy Houston | 32 | Wife | — | Maine |
| 77 | Allyn Houston | 11 | Son | — | Maine |
| 78 | Philip Lunn | 23 | Employee | Cook | Maine |
| 79 | Thelma Lunn | 23 | Lodger | Maid | Maine |
| 80 | Geo. Cooper | 49 | Head | Mechanic | Maine |
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)