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Mary Mcdonough — 1940 US Census Record
Model Tree available1940 United States Federal Census · King-County, Washington
Our Model Tree links this Mary Mcdonough across the 1920, 1930 and 1940 US Censuses in King-County, Washington (XGBoost, ~Confirmed), with identified parents Mary & John — first a daughter (b.~1891), then head of a 3-person household.
Age 49
b. ~1891
Female
Daughter
Born: Washington
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | King-County, Washington |
| Surname | McDonough |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 49 |
| Marital Status | Single |
| Birthplace | Washington |
| 1935 Residence (City) | Seattle City |
| 1935 Residence (County) | King |
| Additional Details | |
| Occupation | Stenographer |
| Industry | City of Seattle |
| Class of Worker | GW |
| Hours Worked | 44 |
| Income (1939) | 1800 |
| Highest Grade | H 2 |
| 1935 Residence | Same place |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
| Occupation | Stenographer |
| Township / Ward | Seattle City |
| Est. Birth Year | ~1891 |
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 |
|---|---|---|---|---|
| Elizabeth Mcdonough | Daughter | — | 44 | ~1896 |
| Mary Mcdonough | Daughter | — | 49 | ~1891 |
| Conn Mcdonough | Head | — | 75 | ~1865 |
Census Appearances
1920
King, Washington
Daughter, age 29
King, Washington · implied b. ~1891 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDonough |
| Given Name | Mary E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Washington |
| Mother's Birthplace | Ireland |
| Occupation | Yes |
| Industry | Yes |
| Class of Worker | Stenographer |
| Can Read | Ireland |
| Can Write | English |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
1930
King, Washington
Daughter, age 39
King, Washington · implied b. ~1891 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDonough |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 39 |
| Marital Status | Single |
| Birthplace | Washington |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Stenographer |
| Industry | City |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
1940
King-County, Washington
Daughter, age 49
King-County, Washington · implied b. ~1891 — 3 household members
| Surname | McDonough |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 49 |
| Marital Status | Single |
| Birthplace | Washington |
| 1935 Residence (City) | Seattle City |
| 1935 Residence (County) | King |
| Occupation | Stenographer |
| Industry | City of Seattle |
| Class of Worker | GW |
| Hours Worked | 44 |
| Income (1939) | 1800 |
| Highest Grade | H 2 |
| 1935 Residence | Same place |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
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 Mcdonough across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Mary Mcdonough (~0.92 confidence) and father John Mcdonough (~0.92 confidence) and father Conn Mcdonough (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Mary Mcdonough
b. ~1863
Source mother
● Household
· direct · ~0.92
Father
John Mcdonough
b. ~1864
Source father
● Household
· direct · ~0.92
Father
Conn Mcdonough
b. ~1865
Source father
● Household
· direct · ~0.92
This person
Anchor record
Mary Mcdonough
Daughter · 1940 · age 49 · b. ~1891 · Washington
★ You are viewing this record
Sibling
Elizabeth Mcdonough
Sibling · 1940 · age 44
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 — King-County, Washington
Open full size
1940 US Federal Census — King-County, Washington
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04379-00300)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Phillip Rickert | 56 | Head | Steam Fitter | Alabama |
| 42 | Thelma Rickert | 27 | Wife | — | Alabama |
| 43 | Verne Rickert | 8 | Daughter | — | Washington |
| 44 | Thomas Rickert | 5 | Son | — | Washington |
| 45 | Benjamin Rickert | 4 | Son | — | Washington |
| 46 | Virgil Rickert | 5 | Son | — | Washington |
| 47 | Vernon Rickert | 5 | Son | — | Washington |
| 48 | Elizabeth Rock | 63 | Head | — | Washington |
| 49 | Austin Chiffitte | 76 | Head | Lawyer | England |
| 50 | Ella M. Chiffitte | 76 | Wife | — | Pennsylvania |
| 51 | Doris Davis | 57 | Head | Cook | Illinois |
| 52 | Joan Davis | 7 | Daughter | — | Washington |
| 53 | Charles Nieminen | 62 | Head | — | Illinois |
| 54 | Mary Nieminen | 23 | Wife | — | Iowa |
| 55 | Charles Nieminen | 18 | Son | — | Canada English |
| 56 | Anna M. Nieminen | 15 | Daughter | — | Canada English |
| 57 | Henry Nieminen | 14 | Son | — | Canada English |
| 58 | James Riddell | 55 | Head | Shipwright | Scotland |
| 59 | Julia W. Riddell | 50 | Wife | — | Washington |
| 60 | Robert Riddell | 15 | Son | — | Washington |
| 61 | Richard S. Jones | 61 | Head | Meter Repairman | Minnesota |
| 62 | Effie C. Jones | 59 | Wife | — | Minnesota |
| 63 | Dolly Moore | 59 | Sister-in-law | — | Minnesota |
| 64 | Harry Keeler | 30 | Head | Salesman | Pennsylvania |
| 65 | Marion Keeler | 28 | Wife | — | New York |
| 66 | Howard J. Keeler | 3 | Son | — | Washington |
| 67 | Darlene Keeler | 1 | Daughter | — | Washington |
| 68 | James T. Goss | 34 | Head | Salesman | Washington |
| 69 | Monica Goss | 29 | Wife | — | Minnesota |
| 70 | James T. Jr. Goss | 3 | Son | — | Washington |
| 71 | Jenny Goss | 54 | Mother | — | Illinois |
| 72 | Robert A. Rock | 62 | Head | Inspector | Washington |
| 73 | Ella M. Rock | 54 | Wife | — | Minnesota |
| 74 | Charles Henning | 34 | Son-in-law | — | Massachusetts |
| 75 | Roberta Henning | 28 | Daughter | Stenographer | Washington |
| 76 | Valerie Henning | 3 | Gr. Daughter | — | Washington |
| 77 | Conn Mcdonough | 75 | Head | — | Irish Free State |
| 78 | Mary Mcdonough THIS PERSON | 49 | Daughter | Stenographer | Washington |
| 79 | Elizabeth Mcdonough | 44 | Daughter | Stenographer | Washington |
| 80 | Louis Shikman | 32 | Head | Owner | Russia |
Pedigree Summary
Mary + 1 sibling
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)