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Mary Maher — 1920 US Census Record
Linked across censuses1920 United States Federal Census · Will, Illinois
Our Model Tree links this Mary Maher across the 1920, 1930 and 1940 US Censuses in Will, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1876), then head of a 13-person household.
Age 44
b. ~1876
Female
Spouse
Born: Illinois
Married
1920 Census Record Details
| Census Year | 1920 |
| Location | Will, Illinois |
| Surname | Maher |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Maryland |
| Additional Details | |
| Occupation | Keeper |
| Industry | Lodging house |
| Class of Worker | Oa |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Keeper |
| Township / Ward | Joliet City |
| Est. Birth Year | ~1876 |
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.
13 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| James Workman | Son | — | 16 | ~1904 |
| William Maher | Head | — | 45 | ~1875 |
| Thomas O'Brien | Other | — | 36 | ~1884 |
| James O'Brien | Son | — | ~1920 | |
| Mary O'Brien | Spouse | — | 26 | ~1894 |
| Thomas O'Brien | Son | — | 4 | ~1916 |
| Chris Sorensen | Other | — | 59 | ~1861 |
| Edward Workman | Son | — | 21 | ~1899 |
| John O'Brien | Son | — | 2 | ~1918 |
| Mary Maher | Spouse | — | 44 | ~1876 |
| John O'Brien | Other | — | 45 | ~1875 |
| Charles Greminger | Other | — | 50 | ~1870 |
| John Leahy | Other | — | 28 | ~1892 |
Census Appearances
1920
Will, Illinois
Spouse, age 44
Will, Illinois · implied b. ~1876 — 13 household members
| Surname | Maher |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Maryland |
| Occupation | Keeper |
| Industry | Lodging house |
| Class of Worker | Oa |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Will, Illinois
Spouse, age 53
Will, Illinois · implied b. ~1877 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Maher |
| Given Name | May E |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 53 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 18 |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Maryland |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Will-County, Illinois
Spouse, age 64
Will-County, Illinois · implied b. ~1876 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Maher |
| Given Name | May |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 64 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Joliet City |
| 1935 Residence (County) | Will |
| Class of Worker | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 Maher 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 Maher
Spouse · 1920 · age 44 · b. ~1876 · 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 — Will, Illinois
Open full size
1920 US Federal Census — Will, Illinois
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu415unit:1057)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Edward Farmer | 47 | Lodger | Wagon Driver | Virginia |
| 52 | Katherine Knoblauch | 55 | Head | Operator | Illinois |
| 53 | Peter Roach | 54 | Head | Plasterer | Illinois |
| 54 | Ada Roach | 48 | Sister | — | Illinois |
| 55 | Charles Young | 45 | Lodger | Carpenter | Canada |
| 56 | Harry Ghedini | 51 | Head | — | Saxony |
| 57 | Lucy Ghedini | 49 | Wife | — | Illinois |
| 58 | George Baradish | 34 | Boarder | Watchmaker | Illinois |
| 59 | Carl Bunneman | 62 | Lodger | Cook | England |
| 60 | Alfred Ehlers | 20 | Lodger | Apprentice | Iowa |
| 61 | George Pool | 39 | Head | Moulder | Indiana |
| 62 | Mary Pool | 37 | Wife | — | Indiana |
| 63 | George Pool | 17 | Son | — | Indiana |
| 64 | Elizabeth Pool | 14 | Daughter | — | Indiana |
| 65 | Myrtle Pool | 6 | Son | — | Illinois |
| 66 | Mae Pool | 2 | Daughter | — | Illinois |
| 67 | Fay Pool | 2 | Daughter | — | Illinois |
| 68 | Chester Wiggs | 23 | Lodger | Commissary | Illinois |
| 69 | Albert Bates | 75 | Head | Manager | Pennsylvania |
| 70 | Theodore Reinberg | 47 | Lodger | Laborer | Russia |
| 71 | John Wills | 55 | Head | Carpenter | Illinois |
| 72 | Ella Wills | 55 | Wife | Keeper | Illinois |
| 73 | James Coulson | 26 | Lodger | Plumber | Missouri |
| 74 | Michael Doucher | 34 | Lodger | Coremaker | Iowa |
| 75 | Joseph Stamaker | 24 | Head | Laborer | Michigan |
| 76 | Emma Stamaker | 21 | Wife | — | Michigan |
| 77 | John Hoody | 36 | Head | Machinist | New York |
| 78 | Elberta Hoody | 32 | Wife | — | Illinois |
| 79 | James Fox | 57 | Head | Wiredrawer | Ireland |
| 80 | Katherine Fox | 55 | Wife | — | Canada |
| 81 | Sarah Fox | 26 | Daughter | — | Illinois |
| 82 | Lawrence Fox | 12 | Son | — | Illinois |
| 83 | Louis Roder | 39 | Head | Carpenter | Illinois |
| 84 | Alice Roder | 38 | Wife | — | Missouri |
| 85 | Richard Roder | 18 | Son | — | Illinois |
| 86 | Rita Roder | 15 | Daughter | — | Illinois |
| 87 | Geraldine Roder | 12 | Daughter | — | Illinois |
| 88 | William Maher | 45 | Head | Flagman | Illinois |
| 89 | Mary Maher THIS PERSON | 44 | Wife | Keeper | Illinois |
| 90 | Edward Workman | 21 | Son | Clerk | Illinois |
| 91 | James Workman | 16 | Son | Chauffeur | Illinois |
| 92 | Charles Greminger | 50 | Lodger | Car Repairer | Indiana |
| 93 | John Leahy | 28 | Lodger | Switchman | Illinois |
| 94 | Chris Sorensen | 59 | Lodger | — | Norway |
| 95 | John O'Brien | 45 | Lodger | Laborer | Illinois |
| 96 | Thomas O'Brien | 36 | Lodger | Laborer | Illinois |
| 97 | Mary O'Brien | 26 | Wife | — | Illinois |
| 98 | Thomas O'Brien | 4 | Son | — | Illinois |
| 99 | John O'Brien | 2 | Son | — | Illinois |
| 100 | James O'Brien | 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)