MC
Mary Connolly — 1930 US Census Record
Model Tree available1930 United States Federal Census · Cook, Illinois
Our Model Tree links this Mary Connolly across the 1920, 1930 and 1940 US Censuses in Cook, Illinois (XGBoost, ~Confirmed), with identified parents James & Anna — first a daughter (b.~1888), then head of a 5-person household.
Age 42
b. ~1888
Female
Daughter
Born: Illinois
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Cook, Illinois |
| Surname | Connolly |
| Given Name | Mary A. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| 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 | Chicago |
| Est. Birth Year | ~1888 |
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.
5 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Julia Connolly | Head | — | 67 | ~1863 |
| Sarah Connolly | Daughter | — | 37 | ~1893 |
| Mary Connolly | Daughter | — | 42 | ~1888 |
| Alice Connolly | Daughter | — | 36 | ~1894 |
| Orrel Connolly | Daughter | — | 25 | ~1905 |
Census Appearances
1920
Cook, Illinois
Daughter, age 31
Cook, Illinois · implied b. ~1889 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Connolly |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Daughter, age 42
Cook, Illinois · implied b. ~1888 — 5 household members
| Surname | Connolly |
| Given Name | Mary A. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| 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
Head, age 53
Cook-County, Illinois · implied b. ~1887 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Connelly |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 53 |
| Marital Status | Widowed |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Income (1939) | 0 |
| Highest Grade | H 2 |
| 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 Connolly across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Connolly (~0.92 confidence) and mother Anna Connolly (~0.92 confidence) and mother Julia Connolly (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Connolly
b. ~1850
Source father
● Household
· direct · ~0.92
Mother
Anna Connolly
b. ~1862
Source mother
● Household
· direct · ~0.92
Mother
Julia Connolly
b. ~1863
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Connolly
Daughter · 1930 · age 42 · b. ~1888 · Illinois
★ You are viewing this record
Sibling
Alice Connolly
Sibling · 1930 · age 36
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Orrel Connolly
Sibling · 1930 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Sarah Connolly
Sibling · 1930 · age 37
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:illinoiscensus00reel463:0101)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Margaret Enright | 72 | Head | — | Illinois |
| 2 | Mary C. Enright | 37 | Daughter | — | Illinois |
| 3 | Julia Connolly | 67 | Head | — | Ireland |
| 4 | Mary A. Connolly THIS PERSON | 42 | Daughter | — | Illinois |
| 5 | Sarah Connolly | 37 | Daughter | Prop. Dress Shop | Illinois |
| 6 | Alice Connolly | 36 | Daughter | Teacher | Illinois |
| 7 | Orrel Connolly | 25 | Daughter | Stenographer | Illinois |
| 8 | Edw. J. Condon | 63 | Head | Clerk | Illinois |
| 9 | Mary E. Condon | 57 | Wife | — | Maryland |
| 10 | Lawrence J. Condon | 27 | Son | Accountant | Illinois |
| 11 | Jerome J. Condon | 25 | Son | Salesman | Illinois |
| 12 | Chas. B. Patterson | 37 | Head | Training Contractor | Illinois |
| 13 | Corrine E. Patterson | 37 | Wife | — | Illinois |
| 14 | Chas. W. Patterson | 16 | Son | — | Illinois |
| 15 | Dorothy M. Patterson | 13 | Daughter | — | Illinois |
| 16 | Michael Luce | 52 | Head | Pound Off. | Ireland |
| 17 | Mary Luce | 50 | Wife | — | England |
| 18 | Marion Luce | 22 | Daughter | Clerk | Illinois |
| 19 | Margaret Luce | 21 | Daughter | Stenographer | Illinois |
| 20 | Doris M. Luce | 19 | Daughter | Stenographer | Illinois |
| 21 | Oscar Bruebach | 40 | Head | Plate Setter | Illinois |
| 22 | Katherine Bruebach | 38 | Wife | — | Illinois |
| 23 | Edw. Sutherland | 50 | Head | Bookkeeper | Virginia |
| 24 | Ellen Sutherland | 45 | Wife | — | Kansas |
| 25 | Dorothy Sutherland | 19 | Daughter | Secretary | New York |
| 26 | Andrew Mcgaraty | 60 | Head | — | Indiana |
| 27 | Margaret Mcgaraty | 60 | Wife | — | Ireland |
| 28 | John Solarie | 46 | Head | Dept. Manager | Illinois |
| 29 | Catherine Solarie | 38 | Wife | — | Illinois |
| 30 | James Solarie | 1 | Son | — | Illinois |
| 31 | Catherine Solarie | 45 | Head | — | Illinois |
| 32 | Louise Solarie | 35 | Sister | Asst. Clerk | Illinois |
| 33 | John Thomitz | 42 | Head | Dentist | Illinois |
| 34 | Louise Thomitz | 34 | Wife | — | Illinois |
| 35 | John Thomitz | 8 | Son | — | Illinois |
| 36 | Ruth Thomitz | 6 | Daughter | — | Illinois |
| 37 | Richard Thomitz | 4 | Son | — | Illinois |
| 38 | William Thomitz | 2 | Son | — | Illinois |
| 39 | Gilbert Barney | 47 | Head | Photo Engraver | Illinois |
| 40 | Helen Barney | 45 | Wife | — | Illinois |
| 41 | Eileen Barney | 24 | Daughter | Stenographer | Illinois |
| 42 | Margaret Barney | 22 | Daughter | — | Illinois |
| 43 | James Barney | 16 | Son | — | Illinois |
| 44 | John M. Burke | 55 | Head | Salesman | Ireland |
| 45 | Mae Burke | 49 | Wife | — | Wisconsin |
| 46 | Genevieve Burke | 22 | Daughter | Teacher | Illinois |
| 47 | Edward Burke | 17 | Son | — | Illinois |
| 48 | Edward Kehoe | 72 | Head | — | New York |
| 49 | Anna Mcwilliams | 40 | Servant | Servant | Illinois |
| 50 | Nick Houlihan | 40 | Head | Electrician | Illinois |
Pedigree Summary
Mary + 3 siblings
Gen 1 · 3 parents
~0.92
Max depth 4 (1900–1950 window)
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)