MM
Mary Mcdonnell — 1930 US Census Record
Model Tree available1930 United States Federal Census · Washington, Minnesota
Our Model Tree links this Mary Mcdonnell across the 1920, 1930 and 1940 US Censuses in Washington, Minnesota (XGBoost, ~Confirmed), with identified parents Emmet & Ernest — first a daughter (b.~1918), then head of a 5-person household.
Age 12
b. ~1918
Female
Daughter
Born: Minnesota
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Washington, Minnesota |
| Surname | McDonnell |
| Given Name | Mary L |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Minnesota |
| Mother's Birthplace | Minnesota |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
| Township / Ward | Lincoln Township |
| Est. Birth Year | ~1918 |
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.
5 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Thomas Mcdonnell | Son | — | 16 | ~1914 |
| Robert Mcdonnell | Son | — | 8 | ~1922 |
| Lorna Mcdonnell | Other | — | 40 | ~1890 |
| Mary Mcdonnell | Daughter | — | 12 | ~1918 |
| Ernest Mcdonnell | Head | — | 40 | ~1890 |
Census Appearances
1920
Washington, Minnesota
Daughter, age 1
Washington, Minnesota · implied b. ~1919 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDonnell |
| Given Name | Mary L |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Minnesota |
| Mother's Birthplace | Minnesota |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1930
Washington, Minnesota
Daughter, age 12
Washington, Minnesota · implied b. ~1918 — 5 household members
| Surname | McDonnell |
| Given Name | Mary L |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Minnesota |
| Mother's Birthplace | Minnesota |
| Can Read/Write | Yes |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1940
Washington-County, Minnesota
Daughter, age 22
Washington-County, Minnesota · implied b. ~1918 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDonald |
| Given Name | Mary L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Minnesota |
| 1935 Residence (City) | Mahtomedi Village |
| 1935 Residence (County) | Washington |
| Occupation | Private secretary |
| Industry | Insurance Company |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1200 |
| Highest Grade | H 4 |
| 1935 Residence | Same House |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
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 Mcdonnell across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Emmet Mcdonnell (~0.92 confidence) and father Ernest Mcdonnell (~0.92 confidence) and mother Louise Mcdonnell (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Emmet Mcdonnell
b. ~1890
Source father
● Household
· direct · ~0.92
Father
Ernest Mcdonnell
b. ~1890
Source father
● Household
· direct · ~0.92
Mother
Louise Mcdonnell
b. ~1890
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Mcdonnell
Daughter · 1930 · age 12 · b. ~1918 · Minnesota
★ You are viewing this record
Sibling
Thomas Mcdonnell
Sibling · 1930 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Mcdonnell
Sibling · 1930 · age 8
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
1930 US Federal Census — Washington, Minnesota
Open full size
1930 US Federal Census — Washington, Minnesota
Page Contents
50 people indexed on this census page (ia:1930:minnesotacensus00reel1134:0211)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Chas A Miley | 27 | Head | Minister | Indiana |
| 2 | Amy E Miley | 23 | Wife-H | — | Indiana |
| 3 | Ralph E Miley | 2 | Son | — | Minnesota |
| 4 | Frank R Miley | 1 | Son | — | Minnesota |
| 5 | F. E. Harrington | 47 | Head | Accountant | Minnesota |
| 6 | Emma L Harrington | 38 | Wife-H | — | Minnesota |
| 7 | Shirley B Harrington | 6 | Daughter | — | Minnesota |
| 8 | Robert E Harrington | 4 | Son | — | Minnesota |
| 9 | Donald A Harrington | 3 | Son | — | Minnesota |
| 10 | J. H. Jennings | 53 | Head | Estimator | Connecticut |
| 11 | Agnes Jennings | 32 | Wife-H | — | Utah |
| 12 | Isabel Grader | 25 | Servant | Servant | Minnesota |
| 13 | Olai Haugen | 59 | Head | Contractor | Norway |
| 14 | Anna Haugen | 60 | Wife-H | — | Norway |
| 15 | Ragner Haugen | 28 | Son | Carpenter | Norway |
| 16 | Jas B. Mcdonough | 31 | Head | Dispatcher | Minnesota |
| 17 | Mona Mcdonough | 30 | Wife-H | — | Norway |
| 18 | Egert Herstad | 39 | Head | Agent | Norway |
| 19 | Signe Herstad | 32 | Wife-H | — | Norway |
| 20 | Thor R Herstad | 8 | Son | — | Minnesota |
| 21 | Corinne M Herstad | 5 | Daughter | — | Minnesota |
| 22 | Wm. F Dillery | 42 | Head | Carpenter | Minnesota |
| 23 | Florence Dillery | 36 | Wife-H | — | Minnesota |
| 24 | John W Dillery | 15 | Son | — | Minnesota |
| 25 | Lucille Dillery | 14 | Daughter | — | Minnesota |
| 26 | Stem Petersen | 47 | Head | Contractor | Denmark |
| 27 | Nannie M Petersen | 47 | Wife-H | — | Sweden |
| 28 | Sidney A Petersen | 22 | Son | Mason | Minnesota |
| 29 | Gladys M Petersen | 17 | Daughter | — | Minnesota |
| 30 | Earl E Miller | 23 | Boarder | Teacher | North Dakota |
| 31 | Pearl M Risch | 23 | Boarder | Teacher | Minnesota |
| 32 | Joseph J Sullivan | 62 | Head | Attorney | Minnesota |
| 33 | Kittie E Sullivan | 59 | Wife-H | — | Wisconsin |
| 34 | Fred W Winters | 26 | Servant | Servant | Wisconsin |
| 35 | Ernest J Mcdonnell | 40 | Head | Dept. Manager | Minnesota |
| 36 | Lorna M Mcdonnell | 40 | Wife-H | — | Minnesota |
| 37 | Thomas E Mcdonnell | 16 | Son | — | Minnesota |
| 38 | Mary L Mcdonnell THIS PERSON | 12 | Daughter | — | Minnesota |
| 39 | Robert E Mcdonnell | 8 | Son | — | Minnesota |
| 40 | Edw. R Spink | 35 | Head | Salesman | North Dakota |
| 41 | Ruth S Spink | 31 | Wife-H | — | Minnesota |
| 42 | Douglas W Spink | 7 | Son | — | Minnesota |
| 43 | Isaac Thompson | 71 | Head | — | Wisconsin |
| 44 | Carrie V. Thompson | 70 | Wife-H | — | Iowa |
| 45 | Verna Thompson | 41 | Daughter | Bookkeeper | Nebraska |
| 46 | Anthony H Chrys | 40 | Head | Coml. Search | Minnesota |
| 47 | Marion H Chrys | 39 | Wife-H | — | Minnesota |
| 48 | Marion E Chrys | 17 | Daughter | — | Minnesota |
| 49 | Adele M Chrys | 15 | Daughter | — | Minnesota |
| 50 | Gwendolyn L Chrys | 12 | Daughter | — | Minnesota |
Pedigree Summary
Mary + 2 siblings
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 1930 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)