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Mary Mcnally — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Mary Mcnally across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1927), then head of a 9-person household.
Age 13
b. ~1927
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | McNally |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Highest Grade | 7 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago |
| Est. Birth Year | ~1927 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Barbara Mcnally | Daughter | — | ~1940 | |
| Patrick Mcnally | Son | — | 12 | ~1928 |
| Patricia Mcnally | Daughter | — | 8 | ~1932 |
| Sarah Mcnally | Daughter | — | 10 | ~1930 |
| Patrick Mcnally | Head | — | 42 | ~1898 |
| Mary Mcnally | Spouse | — | 36 | ~1904 |
| Catherine Mcnally | Daughter | — | 2 | ~1938 |
| Lawrence Mcnally | Son | — | 5 | ~1935 |
| Mary Mcnally | Daughter | — | 13 | ~1927 |
Census Appearances
1930
Cook, Illinois
Daughter, age 4
Cook, Illinois · implied b. ~1926 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McNally |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | No. Ireland |
| Mother's Birthplace | No. Ireland |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Daughter, age 13
Cook-County, Illinois · implied b. ~1927 — 9 household members
| Surname | McNally |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Highest Grade | 7 |
| 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 Mcnally across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Mcnally
Daughter · 1940 · age 13 · b. ~1927 · Illinois
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Sibling
Patricia Mcnally
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Sarah Mcnally
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Mcnally
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Barbara Mcnally
Sibling · 1940 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patrick Mcnally
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lawrence Mcnally
Sibling · 1940 · age 5
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-t0627-00995-00030)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Jessie Woodworth | 45 | Sister | — | Iowa |
| 42 | Eva Marple | 50 | Lodger | — | Iowa |
| 43 | George Slaby | 45 | Head | Automobile Mechanic | Illinois |
| 44 | Marie Slaby | 43 | Wife | — | Illinois |
| 45 | Edward O'Connell | 31 | Head | Policeman | Illinois |
| 46 | Anne O'Connell | 23 | Wife | — | Illinois |
| 47 | Margaret O'Connell | 2 | Daughter | — | Illinois |
| 48 | Thomas O'Connell | 1 | Son | — | Illinois |
| 49 | Edward Fitzgerald | 41 | Head | Conductor | Illinois |
| 50 | Josephine Fitzgerald | 42 | Wife | — | Missouri |
| 51 | Edward Fitzgerald | 14 | Son | — | Illinois |
| 52 | Joan Fitzgerald | 13 | Daughter | — | Illinois |
| 53 | John Cianciarulo | 54 | Head | Machinist | Italy |
| 54 | Ann Cianciarulo | 48 | Wife | — | Italy |
| 55 | Angeline Cianciarulo | 18 | Daughter | — | Illinois |
| 56 | Anna Cianciarulo | 14 | Daughter | — | Illinois |
| 57 | Dorothy Cianciarulo | 14 | Daughter | — | Illinois |
| 58 | Albert F. Wintubl | 52 | Head | Superintendent | Illinois |
| 59 | Florence Wintubl | 42 | Wife | — | Illinois |
| 60 | Albert Wintubl | 19 | Son | New Worker | Illinois |
| 61 | Mary Jane Wintubl | 15 | Daughter | — | Illinois |
| 62 | William Wintubl | 12 | Son | — | Illinois |
| 63 | Robert Wintubl | 9 | Son | — | Illinois |
| 64 | Lona Jean Wintubl | 2 | Daughter | — | Illinois |
| 65 | Maud Wood | 20 | Daughter | — | Illinois |
| 66 | William Wood | 80 | Father | — | New York |
| 67 | Grace Wood | 77 | Mother | — | Canada, English |
| 68 | Charles E. Schiffer | 26 | Head | Dental Lab. | Illinois |
| 69 | Josephine Schiffer | 29 | Wife | — | Brooklyn |
| 70 | Charlotte Schiffer | 4 | Daughter | — | Illinois |
| 71 | Richard Schiffer | 1 | Son | — | Illinois |
| 72 | Patrick Mcnally | 42 | Head | Bus Driver | Ireland |
| 73 | Mary Mcnally | 36 | Wife | — | Ireland |
| 74 | Mary Mcnally THIS PERSON | 13 | Daughter | — | Illinois |
| 75 | Patrick Mcnally | 12 | Son | — | Illinois |
| 76 | Sarah Mcnally | 10 | Daughter | — | Illinois |
| 77 | Patricia Mcnally | 8 | Daughter | — | Illinois |
| 78 | Lawrence Mcnally | 5 | Son | — | Illinois |
| 79 | Catherine Mcnally | 2 | Daughter | — | Illinois |
| 80 | Barbara Mcnally | 0 | Daughter | — | Illinois |
Related Census Records
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)