MC
Mary Cavanaugh — 1920 US Census Record
Linked across censuses1920 United States Federal Census · Cook, Illinois
Our Model Tree links this Mary Cavanaugh across the 1920, 1930 and 1940 US Censuses in Cook, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1885), then head of a 6-person household.
Age 35
b. ~1885
Female
Spouse
Born: Ireland
Married
1920 Census Record Details
| Census Year | 1920 |
| Location | Cook, Illinois |
| Surname | Cavanaugh |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Ireland |
| Year of Immigration | 1903 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Est. Birth Year | ~1885 |
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.
6 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| James Cavanaugh | Head | — | 36 | ~1884 |
| Catherine Cavanaugh | Daughter | — | 8 | ~1912 |
| John Cavanaugh | Son | — | 12 | ~1908 |
| Mary Cavanaugh | Spouse | — | 35 | ~1885 |
| Lillian Cavanaugh | Daughter | — | 10 | ~1910 |
| Nellie O'Connell | Other | — | 26 | ~1894 |
Census Appearances
1920
Cook, Illinois
Spouse, age 35
Cook, Illinois · implied b. ~1885 — 6 household members
| Surname | Cavanaugh |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Ireland |
| Year of Immigration | 1903 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1930
Cook, Illinois
Spouse, age 45
Cook, Illinois · implied b. ~1885 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cavanaugh |
| Given Name | Margaret |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1903 |
| Age at First Marriage | 32 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
Cook-County, Illinois
Head, age 54
Cook-County, Illinois · implied b. ~1886 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cavanaugh |
| Given Name | Margaret |
| Relationship to Head | head |
| Sex | F |
| Color / Race | White |
| Age | 54 |
| Marital Status | Single |
| Birthplace | Ireland |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Occupation | none |
| Income (1939) | 0 |
| Highest Grade | H-4 |
| 1935 Residence | Same house |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
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 Cavanaugh across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Cavanaugh
Spouse · 1920 · age 35 · b. ~1885 · Illinois
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1920 US Federal Census — Cook, Illinois
Open full size
1920 US Federal Census — Cook, Illinois
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu315unit:0965)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Edward Miller | 23 | Step son | Conductor | Illinois |
| 52 | George Geiger | 50 | Head | Messenger | Germany |
| 53 | Anna Geiger | 51 | Wife | — | Iowa |
| 54 | George Jr. Geiger | 18 | Son | Clerk | Iowa |
| 55 | Eileen Geiger | 12 | Daughter | — | Iowa |
| 56 | Frederick Geiger | 10 | Son | — | Iowa |
| 57 | John Boyd | 56 | Head | Watchman | Ireland |
| 58 | Anna Boyd | 48 | Wife | — | Ireland |
| 59 | Charlotte Boyd | 24 | Daughter | Cashier | Illinois |
| 60 | Harriet Boyd | 21 | Daughter | Stenographer | Illinois |
| 61 | Anna Boyd | 18 | Daughter | — | Illinois |
| 62 | Robert Malmberg | 30 | Lodger | Police Officer | Iowa |
| 63 | Robert O'Neil | 53 | Head | Conductor | Ireland |
| 64 | Mary O'Neil | 51 | Wife | — | Ireland |
| 65 | Ernest O'Neil | 22 | Son | Salesman | Illinois |
| 66 | Joseph O'Neil | 19 | Son | Stenographer | Illinois |
| 67 | Alice O'Neil | 16 | Daughter | Clerk | Illinois |
| 68 | Helen O'Neil | 13 | Daughter | — | Illinois |
| 69 | Margaret O'Neil | 10 | Daughter | — | Illinois |
| 70 | William Merritt | 48 | Head | Optician | Michigan |
| 71 | Lillian Merritt | 42 | Wife | — | Illinois |
| 72 | William Jr. Merritt | 18 | Son | Clerk | Illinois |
| 73 | John Merritt | 6 | Son | — | Illinois |
| 74 | John Williams | 65 | Father-in-law | Civil Engineer | Canada |
| 75 | Sidney Ohi | 39 | Head | Draftsman | Japan |
| 76 | Kate Ohi | 29 | Wife | — | Kansas |
| 77 | Kuma Ohi | 7 | Daughter | — | Illinois |
| 78 | Ree Ohi | 4 | Daughter | — | Illinois |
| 79 | Charles Zahorik | 37 | Head | Boilermaker | Wisconsin |
| 80 | Eileen Zahorik | 35 | Wife | — | Wisconsin |
| 81 | James Zahorik | 14 | Son | — | Minnesota |
| 82 | John Zahorik | 13 | Son | — | Minnesota |
| 83 | Patsy Zahorik | 10 | Daughter | — | Wisconsin |
| 84 | Charles Zahorik | 7 | Son | — | Wisconsin |
| 85 | Robert Zahorik | 2 | Son | — | Illinois |
| 86 | James Cavanaugh | 36 | Head | Police Chief | Illinois |
| 87 | Mary Cavanaugh THIS PERSON | 35 | Wife | — | Ireland |
| 88 | John Cavanaugh | 12 | Son | — | Illinois |
| 89 | Lillian Cavanaugh | 10 | Daughter | — | Illinois |
| 90 | Catherine Cavanaugh | 8 | Daughter | — | Illinois |
| 91 | Nellie O'Connell | 26 | Sister-in-law | Operator | Ireland |
| 92 | Ellen M. Darley | 65 | Head | — | Connecticut |
| 93 | Laura Darley | 37 | Daughter | Clerk | Illinois |
| 94 | Bridget Darley | 30 | Daughter | Clerk | Illinois |
| 95 | David Darley | 25 | Son | Fireman | Illinois |
| 96 | Lawrence Darley | 27 | Son | Civil Engineer | Illinois |
| 97 | James Darley | 23 | Son | Chauffeur | Illinois |
| 98 | William Mcdonough | 21 | Head | Electrician'S Helper | Illinois |
| 99 | Pearl Mcdonough | 21 | Wife | — | Iowa |
| 100 | William Mcdonough | 0 | Son | — | Illinois |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1920 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)