MB
Mary Byrne — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Cook, Illinois
Our Model Tree links this Mary Byrne across the 1930 and 1940 US Censuses in Cook, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1899), then head of a 9-person household.
Age 31
b. ~1899
Female
Spouse
Born: Illinois
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Cook, Illinois |
| Surname | Byrne |
| Given Name | Mary M |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 18 |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1899 |
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 |
|---|---|---|---|---|
| Margaret Byrne | Daughter | — | 6 | ~1924 |
| Catherine Byrne | Daughter | — | 1 | ~1929 |
| Mary Byrne | Daughter | — | 10 | ~1920 |
| Barbara Byrne | Daughter | — | 11 | ~1919 |
| Patrick Byrne | Head | — | 37 | ~1893 |
| Edward Byrne | Son | — | 3 | ~1927 |
| Thomas Byrne | Son | — | 8 | ~1922 |
| Michael Byrne | Son | — | 5 | ~1925 |
| Mary Byrne | Spouse | — | 31 | ~1899 |
Census Appearances
1930
Cook, Illinois
Spouse, age 31
Cook, Illinois · implied b. ~1899 — 9 household members
| Surname | Byrne |
| Given Name | Mary M |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 18 |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Daughter, age 43
Cook-County, Illinois · implied b. ~1897 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Byrnes |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 43 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | bookkeeper |
| Industry | private family |
| Class of Worker | PW |
| Hours Worked | 39 |
| Income (1939) | 1094 |
| 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 Byrne across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Byrne
Spouse · 1930 · age 31 · b. ~1899 · Illinois
★ You are viewing this record
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:1930:15thcensuspopula445unit:0880)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Frank Bilecki | 54 | Head | — | Poland |
| 2 | Lucy Bilecki | 54 | Wife | — | Poland |
| 3 | Frances Bilecki | 32 | Daughter | Office Work | Illinois |
| 4 | Julia Bilecki | 29 | Daughter | Operator | Illinois |
| 5 | Frank Bilecki | 23 | Son | Printing | Illinois |
| 6 | Margaret Bilecki | 20 | Daughter | Waitress | Illinois |
| 7 | Josephine Bilecki | 18 | Daughter | Saleslady | Illinois |
| 8 | Sophie Bilecki | 16 | Daughter | — | Illinois |
| 9 | Martin Bilecki | 12 | Son | — | Illinois |
| 10 | Bernadine Bilecki | 4 | Daughter | — | Illinois |
| 11 | Patrick Lyman | 60 | Head | Laborer | Irish Free State |
| 12 | Martin Lyman | 24 | Son | Trucker | Illinois |
| 13 | Mary C Lyman | 18 | Daughter | General Office | Illinois |
| 14 | Michael Prendergast | 43 | Head | Motorman | Irish Free State |
| 15 | Nora Prendergast | 38 | Wife | — | Irish Free State |
| 16 | Barbara M Prendergast | 10 | Daughter | — | Illinois |
| 17 | John J Prendergast | 7 | Son | — | Illinois |
| 18 | Julia E Prendergast | 4 | Daughter | — | Illinois |
| 19 | Patrick Byrne | 37 | Head | Conductor | Illinois |
| 20 | Mary M Byrne THIS PERSON | 31 | Wife | — | Illinois |
| 21 | Barbara J Byrne | 11 | Daughter | — | Illinois |
| 22 | Mary J Byrne | 10 | Daughter | — | Illinois |
| 23 | Thomas M Byrne | 8 | Son | — | Illinois |
| 24 | Margaret Byrne | 6 | Daughter | — | Illinois |
| 25 | Michael Byrne | 5 | Son | — | Illinois |
| 26 | Edward Byrne | 3 | Son | — | Illinois |
| 27 | Catherine Byrne | 1 | Daughter | — | Illinois |
| 28 | Peter W Dolan | 54 | Head | Driver | Illinois |
| 29 | Catherine Dolan | 38 | Wife | — | Illinois |
| 30 | Veronica M Dolan | 15 | Daughter | — | Illinois |
| 31 | Catherine C Dolan | 13 | Daughter | — | Illinois |
| 32 | Bridget Madsen | 63 | Mother-in-law | — | New York |
| 33 | Edward Madsen | 28 | Brother-in-law | Driver | Illinois |
| 34 | Thomas Lenner | 37 | Head | Steam Fitter | Illinois |
| 35 | Mary A Lenner | 35 | Wife | — | Illinois |
| 36 | Esther L Lenner | 12 | Daughter | — | Illinois |
| 37 | Thomas F Lenner | 10 | Son | — | Illinois |
| 38 | Thomas Shannon | 38 | Head | Teamster | Irish Free State |
| 39 | Stella Shannon | 33 | Wife | — | Irish Free State |
| 40 | Mary J Shannon | 5 | Daughter | — | Illinois |
| 41 | Thomas E Shannon | 2 | Son | — | Illinois |
| 42 | Edward J Shannon | 0 | Son | — | Illinois |
| 43 | William E Shannon | 31 | Brother | Steam Fitter | Irish Free State |
| 44 | John M Shannon | 2 | Nephew | — | Illinois |
| 45 | Patrick Glavey | 31 | Brother-in-law | Baggage Man | Irish Free State |
| 46 | Mary J Glavey | 29 | Sister-in-law | Waitress | Irish Free State |
| 47 | John J Cafferty | 29 | Head | Welder | Irish Free State |
| 48 | Margaret Cafferty | 27 | Wife | — | Irish Free State |
| 49 | John Cafferty | 10 | Son | — | Michigan |
| 50 | Mary J Cafferty | 9 | Daughter | — | Michigan |
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)