MC
Mary Connors — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Cook, Illinois
Our Model Tree links this Mary Connors across the 1930 and 1940 US Censuses in Cook, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1921), then head of a 9-person household.
Age 9
b. ~1921
Female
Daughter
Born: Illinois
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Cook, Illinois |
| Surname | Connors |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | City Of Chicago |
| Est. Birth Year | ~1921 |
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 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Nora Connors | Spouse | — | 44 | ~1886 |
| Mary Connors | Daughter | — | 9 | ~1921 |
| James Connors | Son | — | 8 | ~1922 |
| Patrick Connors | Son | — | 11 | ~1919 |
| William Connors | Son | — | 6 | ~1924 |
| John Connors | Son | — | 17 | ~1913 |
| Thomas Connors | Son | — | 16 | ~1914 |
| John Connors | Head | — | 45 | ~1885 |
| Francis Connors | Son | — | 14 | ~1916 |
Census Appearances
1930
Cook, Illinois
Daughter, age 9
Cook, Illinois · implied b. ~1921 — 9 household members
| Surname | Connors |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Daughter, age 20
Cook-County, Illinois · implied b. ~1920 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Connor |
| Given Name | Marie |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Highest Grade | H 4 |
| 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 Connors across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Connors
Daughter · 1930 · age 9 · b. ~1921 · Illinois
★ You are viewing this record
Sibling
Francis Connors
Sibling · 1930 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Connors
Sibling · 1930 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patrick Connors
Sibling · 1930 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Connors
Sibling · 1930 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Connors
Sibling · 1930 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Connors
Sibling · 1930 · age 6
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 — Cook, Illinois
Open full size
1930 US Federal Census — Cook, Illinois
Page Contents
50 people indexed on this census page (ia:1930:illinoiscensus00reel436:0337)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Edward Burns | 57 | Head | Laborer | Illinois |
| 52 | Margaret Burns | 47 | Wife | — | Illinois |
| 53 | Raymond Burns | 26 | Son | Chauffeur | Illinois |
| 54 | Richard Bird | 65 | Head | Painter | New York |
| 55 | Louisa Bird | 65 | Wife | — | England |
| 56 | Charles Hidinger | 50 | Head | Clerk | Illinois |
| 57 | Anna Hidinger | 40 | Wife | — | Illinois |
| 58 | Charles Jr Hidinger | 15 | Son | — | Illinois |
| 59 | Edward Shallow | 42 | Head | Motorman | Illinois |
| 60 | Bessie Shallow | 36 | Wife | — | Illinois |
| 61 | Michael Nolan | 72 | Head | — | Ireland |
| 62 | Josephine Nolan | 70 | Wife | — | Wisconsin |
| 63 | Joseph Nolan | 18 | Son | Mail Carrier | Illinois |
| 64 | Marie Nolan | 15 | Daughter | — | Illinois |
| 65 | John Connors | 45 | Head | Laborer | Ireland |
| 66 | Nora Connors | 44 | Wife | — | Ireland |
| 67 | John Connors | 17 | Son | Clerk | Illinois |
| 68 | Thomas Connors | 16 | Son | — | Illinois |
| 69 | Francis Connors | 14 | Son | — | Illinois |
| 70 | Patrick Connors | 11 | Son | — | Illinois |
| 71 | Mary Connors THIS PERSON | 9 | Daughter | — | Illinois |
| 72 | James Connors | 8 | Son | — | Illinois |
| 73 | William Connors | 6 | Son | — | Illinois |
| 74 | John Lynch | 35 | Head | Laborer | Indiana |
| 75 | Sophia Lynch | 31 | Wife | — | Illinois |
| 76 | Bernadine Lynch | 10 | Daughter | — | Illinois |
| 77 | John Lynch | 9 | Son | — | Illinois |
| 78 | Catherine Lynch | 5 | Daughter | — | Illinois |
| 79 | Mary A Lynch | 1 | Daughter | — | Illinois |
| 80 | Russell Rutherford | 29 | Head | Sorter | Indiana |
| 81 | Jessie Rutherford | 27 | Wife | — | Indiana |
| 82 | Jacqueline Rutherford | 3 | Daughter | — | Indiana |
| 83 | John Scanlon | 29 | Head | Chauffeur | Ireland |
| 84 | Hannah Scanlon | 27 | Wife | — | Ireland |
| 85 | Edward Scanlon | 2 | Son | — | Illinois |
| 86 | Betty Scanlon | 1 | Daughter | — | Illinois |
| 87 | John Hoffmeier | 55 | Head | Packer | Illinois |
| 88 | Katherine Hoffmeier | 50 | Wife | — | Ireland |
| 89 | James Nagle | 51 | Head | Carpenter | Illinois |
| 90 | Mary Nagle | 52 | Sister | — | Illinois |
| 91 | James Delaney | 62 | Head | Laborer | Ireland |
| 92 | Thomas Delaney | 29 | Son | Laborer | New Hampshire |
| 93 | Michael Delaney | 28 | Son | Policeman | New Hampshire |
| 94 | Mary Pierce | 65 | Head | — | Ireland |
| 95 | Julia O'Neil | 28 | Nephew | Laborer | Ireland |
| 96 | Edward O'Neil | 28 | Boarder | — | Ireland |
| 97 | Roy Herman | 21 | Boarder | Electrician | Illinois |
| 98 | Patrick Browne | 75 | Head | Contractor | Ireland |
| 99 | Margaret Browne | 57 | Wife | — | Ireland |
| 100 | Richard Browne | 16 | Son | Helper | Illinois |
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)