MM
Mary Mahoney — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Multnomah-County, Oregon
Our Model Tree links this Mary Mahoney across the 1930 and 1940 US Censuses in Multnomah-County, Oregon (XGBoost, ~Confirmed) — first a daughter (b.~1912), then head of a 8-person household.
Age 28
b. ~1912
Female
Daughter
Born: Oregon
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Multnomah-County, Oregon |
| Surname | Mahoney |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Oregon |
| 1935 Residence (City) | Portland (city) |
| 1935 Residence (County) | Multnomah |
| Additional Details | |
| Occupation | Cannery Worker |
| Industry | Pickles |
| Class of Worker | PW |
| Hours Worked | 21 |
| Income (1939) | 300 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same house |
| Birth State | Oregon |
| Birth Country | United States |
| Birthplace (normalized) | oregon |
| Occupation | Cannery Worker |
| Township / Ward | Portland City |
| Est. Birth Year | ~1912 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Nellie Mahoney | Daughter | — | 14 | ~1926 |
| Mary Mahoney | Daughter | — | 28 | ~1912 |
| John Mahoney | Head | — | 57 | ~1883 |
| Raymond Mahoney | Son | — | 20 | ~1920 |
| Daniel Mahoney | Son | — | 23 | ~1917 |
| John Mahoney | Son | — | 26 | ~1914 |
| James Mahoney | Son | — | 9 | ~1931 |
| Nellie Mahoney | Spouse | — | 48 | ~1892 |
Census Appearances
1930
Multnomah, Oregon
Daughter, age 18
Multnomah, Oregon · implied b. ~1912 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mahony |
| Given Name | Mary E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Oregon |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Oregon |
| Can Read/Write | Yes |
| Birth State | Oregon |
| Birth Country | United States |
| Birthplace (normalized) | oregon |
1940
Multnomah-County, Oregon
Daughter, age 28
Multnomah-County, Oregon · implied b. ~1912 — 8 household members
| Surname | Mahoney |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Oregon |
| 1935 Residence (City) | Portland (city) |
| 1935 Residence (County) | Multnomah |
| Occupation | Cannery Worker |
| Industry | Pickles |
| Class of Worker | PW |
| Hours Worked | 21 |
| Income (1939) | 300 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same house |
| Birth State | Oregon |
| Birth Country | United States |
| Birthplace (normalized) | oregon |
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 Mahoney across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Mahoney
Daughter · 1940 · age 28 · b. ~1912 · Oregon
★ You are viewing this record
Sibling
James Mahoney
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Daniel Mahoney
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Mahoney
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Raymond Mahoney
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Nellie Mahoney
Sibling · 1940 · age 14
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 — Multnomah-County, Oregon
Open full size
1940 US Federal Census — Multnomah-County, Oregon
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-03390-00605)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | James Jubbs | 6 | Son | — | Oregon |
| 2 | Dan K Robert | 27 | Head | Service Station Operator | Oregon |
| 3 | Ruby E Robert | 23 | Wife | — | Oklahoma |
| 4 | Michael J Robert | 2 | Son | — | Oregon |
| 5 | Patricia Jenney | 10 | Niece | — | 3 |
| 6 | Max D. Vincent | 56 | Head | Powderman | North Carolina |
| 7 | May Vincent | 52 | Wife | — | South Carolina |
| 8 | Mona Vincent | 17 | Daughter | — | Oregon |
| 9 | Andrew D Mckennon | 56 | Head | Jailer | Oregon |
| 10 | Elizabeth Mckennon | 61 | Wife | — | Ireland |
| 11 | Ray C Wilson | 55 | Head | Pipe Fitter | Sweden |
| 12 | Margaret J Wilson | 40 | Wife | Stenographer | Minnesota |
| 13 | William S. Baldwin | 47 | Head | Bill Poster | New York |
| 14 | Ruby Baldwin | 41 | Wife | — | Illinois |
| 15 | Helen A Baldwin | 18 | Daughter | — | Washington |
| 16 | Russell M Baldwin | 13 | Son | — | Washington |
| 17 | John Mahoney | 57 | Head | Engineer | Illinois |
| 18 | Nellie Mahoney | 48 | Wife | — | Oregon |
| 19 | Mary Mahoney THIS PERSON | 28 | Daughter | Cannery Worker | Oregon |
| 20 | John Mahoney | 26 | Son | Laborer | Oregon |
| 21 | Daniel Mahoney | 23 | Son | Sailor | Oregon |
| 22 | Raymond Mahoney | 20 | Son | New Worker | Oregon |
| 23 | Nellie Mahoney | 14 | Daughter | — | Oregon |
| 24 | James Mahoney | 9 | Son | — | Oregon |
| 25 | Harry Geet | 35 | Head | Garment Dyer | Illinois |
| 26 | Dorothy Geet | 28 | Wife | — | Oregon |
| 27 | Walter Geet | 8 | Son | — | Oregon |
| 28 | Inari Geet | 3 | Daughter | — | Seattle |
| 29 | Charles S Ponyrow | 29 | Head | House Painter | Oregon |
| 30 | Dorothy Ponyrow | 30 | Wife | — | Oregon |
| 31 | Gary D Ponyrow | 3 | Son | — | Oregon |
| 33 | Merriam G Young | 24 | Head | — | Illinois |
| 34 | Ada N Young | 25 | Wife | — | Michigan |
| 35 | Metis G Young | None | Daughter | Draughtsman Bookkeeper | Oklahoma |
| 36 | Ardeth G Young | 37 | Daughter | Beauty Operator | Oklahoma |
| 37 | Frederick Williams | 44 | Head | Mechanic | Iowa |
| 38 | Adah F Williams | 35 | Wife | — | Iowa |
| 39 | Darlene Williams | 15 | Daughter | — | Iowa |
| 40 | Charlene Kelly | 14 | Daughter | — | Nebraska |
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)