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Mary Arthur — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Mary Arthur across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1929), then head of a 8-person household.
Age 11
b. ~1929
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Arthur |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago |
| Est. Birth Year | ~1929 |
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 |
|---|---|---|---|---|
| John Arthur | Son | — | 2 | ~1938 |
| Mary Arthur | Head | — | 76 | ~1864 |
| Mary Arthur | Daughter | — | 11 | ~1929 |
| Charlotte Delinski | Other | — | 20 | ~1920 |
| Jean Arthur | Son | — | 75 | ~1865 |
| Anne Arthur | Daughter | — | 8 | ~1932 |
| Catherine Arthur | Spouse | — | 78 | ~1862 |
| Herbert Arthur | Son | — | 4 | ~1936 |
Census Appearances
1930
Cook, Illinois
Daughter, age 2
Cook, Illinois · implied b. ~1928 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Arthur |
| Given Name | Margerite |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Daughter, age 11
Cook-County, Illinois · implied b. ~1929 — 8 household members
| Surname | Arthur |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Highest Grade | No 6 |
| 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 Arthur across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Arthur
Daughter · 1940 · age 11 · b. ~1929 · Illinois
★ You are viewing this record
Sibling
Herbert Arthur
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anne Arthur
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jean Arthur
Sibling · 1940 · age 75
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Arthur
Sibling · 1940 · age 2
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 — Cook-County, Illinois
Open full size
1940 US Federal Census — Cook-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00982-00008)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | James Day | 12 | Son | — | Illinois |
| 2 | Julia Mcdonald | 46 | Head | Bill Clerk | Illinois |
| 3 | Catherine Mcdonald | 47 | Daughter | Bill Clerk | Illinois |
| 4 | John Mcdonald | 41 | Brother | Switch | Illinois |
| 5 | Hugh Mcdonald | 32 | Brother | Laborer | Illinois |
| 6 | Nellie Mcdonald | 75 | Mother | — | Irish Free State |
| 7 | Josephine Clinnin | 55 | Head | Principal-Teacher | Nebraska |
| 8 | John Clinnin | 83 | Uncle | — | Illinois |
| 9 | Hunter Clinnin | 19 | Niece | File Clerk | Illinois |
| 10 | Lillian Clinnin | 17 | Niece | — | Illinois |
| 11 | Lorraine Clinnin | 14 | Niece | — | Illinois |
| 12 | Gerald Burns | 67 | Head | Agent Ticket | Illinois |
| 13 | Anna Burns | 61 | Wife | — | Wisconsin |
| 14 | Mabel Burns | 36 | Daughter | Correspondent | Wisconsin |
| 15 | Jane Burns | 26 | Daughter | Manager | Illinois |
| 16 | George Burns | 23 | Son | Insurance Broker | Illinois |
| 17 | Mary Lanigan | 52 | Head | — | Illinois |
| 18 | Rose P. Lanigan | 61 | Sister | — | Indiana |
| 19 | Mary E. Mckinnia | 87 | Head | — | Canada-English |
| 20 | Lillian Mckinnia | 61 | Daughter | Personnel Clerk | Illinois |
| 21 | Mary Arthur | 76 | Head | Librarian | Illinois |
| 22 | Catherine Arthur | 78 | Wife | — | Illinois |
| 23 | Jean Arthur | 75 | Son | — | Illinois |
| 24 | Mary E. Arthur THIS PERSON | 11 | Daughter | — | Illinois |
| 25 | Anne Arthur | 8 | Daughter | — | Illinois |
| 26 | Herbert Arthur | 4 | Son | — | Illinois |
| 27 | John Arthur | 2 | Son | — | Illinois |
| 28 | Charlotte Delinski | 20 | Servant | Servant | Illinois |
| 29 | Geo. H. Quinn | 45 | Head | Secretary | Illinois |
| 30 | Grace Quinn | 40 | Wife | — | Illinois |
| 31 | Geo. Jr. Quinn | 10 | Son | — | Illinois |
| 32 | Edward Quinn | 7 | Son | — | Illinois |
| 33 | Martha Donlan | 44 | Head | — | Eire-Ireland |
| 34 | Edward Donlan | 22 | Son | Filler | Illinois |
| 35 | Robert Donlan | 21 | Son | Service | Illinois |
| 36 | Joseph Donlan | 19 | Son | Correspondent | Illinois |
| 37 | William Donlan | 16 | Son | — | Illinois |
| 38 | Herbert Kirchoff | 46 | Head | Contractor Rep | Illinois |
| 39 | Jessie Kirchoff | 37 | Wife | — | Scotland |
| 40 | Frances Kirchoff | 3 | Daughter | Inventory Clerk | Illinois |
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)