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Robert Lyons — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Robert Lyons across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1930), then head of a 8-person household.
Age 10
b. ~1930
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Lyons |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Highest Grade | No 3 |
| 1935 Residence | Same Place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago |
| Est. Birth Year | ~1930 |
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 Robert | Age | Birth yr |
|---|---|---|---|---|
| William Lyons | Son | — | 12 | ~1928 |
| William Lyons | Head | — | 48 | ~1892 |
| Helen Lyons | Daughter | — | 17 | ~1923 |
| Jerry Lyons | Son | — | 21 | ~1919 |
| Margaret Lyons | Daughter | — | 19 | ~1921 |
| Thomas Lyons | Son | — | 13 | ~1927 |
| Robert Lyons | Son | — | 10 | ~1930 |
| Nellie Lyons | Spouse | — | 48 | ~1892 |
Census Appearances
1930
Cook, Illinois
Son, age
Cook, Illinois · implied b. ~1930 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lyons |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Son, age 10
Cook-County, Illinois · implied b. ~1930 — 8 household members
| Surname | Lyons |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Highest Grade | No 3 |
| 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 Robert Lyons across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Robert Lyons
Son · 1940 · age 10 · b. ~1930 · Illinois
★ You are viewing this record
Sibling
Jerry Lyons
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Lyons
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Lyons
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Lyons
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Lyons
Sibling · 1940 · age 12
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-t0627-00971-00646)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | James F Hogan | 62 | Head | Nightman | Ohio |
| 42 | Susan Hogan | 59 | Wife | — | Illinois |
| 43 | Dorothy Hogan | 21 | Daughter | — | Illinois |
| 44 | Joseph Hogan | 16 | Son | — | Illinois |
| 45 | William Hogan | 29 | Head | Steel Sorter | Illinois |
| 46 | Winifred Hogan | 27 | Wife | — | Ireland |
| 47 | Mary Jane Hogan | 1 | Daughter | — | Illinois |
| 48 | Winifred Ann Hogan | 0 | Daughter | — | Illinois |
| 49 | Frank La Salla | 60 | Head | Fireman | Italy |
| 50 | Frances La Salla | 54 | Wife | — | Italy |
| 51 | John La Salla | 25 | Son | — | Italy |
| 52 | Frank La Salla | 17 | Nephew | Salesman | Illinois |
| 53 | William Lyons | 48 | Head | Gen. Foreman | Ireland |
| 54 | Nellie Lyons | 48 | Wife | — | Ireland |
| 55 | Jerry Lyons | 21 | Son | Credit Correspondent | Illinois |
| 56 | Margaret Lyons | 19 | Daughter | Tester | Illinois |
| 57 | Helen Lyons | 17 | Daughter | — | Illinois |
| 58 | Thomas Lyons | 13 | Son | — | Illinois |
| 59 | William Lyons | 12 | Son | — | Illinois |
| 60 | Robert Lyons THIS PERSON | 10 | Son | — | Illinois |
| 61 | Edward Mallard | 40 | Head | Clerk | Illinois |
| 62 | Alice Mallard | 34 | Wife | — | Illinois |
| 63 | Winifred Mallard | 12 | Daughter | — | Illinois |
| 64 | Edward Jr. Mallard | 4 | Son | — | Illinois |
| 65 | Peter Gonzales | 31 | Head | Painter | California |
| 66 | Jean Gonzales | 27 | Wife | — | Illinois |
| 67 | David Gonzales | 8 | Son | — | Illinois |
| 68 | Alice Gonzales | 6 | Daughter | — | Illinois |
| 69 | Anita Gonzales | 4 | Daughter | — | Illinois |
| 70 | Ben Coroglato | 59 | Head | Table Sander | Italy |
| 71 | Rae Coroglato | 53 | Wife | — | Italy |
| 72 | John Coroglato | 20 | Son | Dock Hand | Illinois |
| 73 | Lucy Coroglato | 17 | Daughter | Operator | Illinois |
| 74 | Mildred Coroglato | 22 | Daughter | Server | Illinois |
| 75 | Joseph Novelli | 51 | Head | Stockman | Italy |
| 76 | Mary Novelli | 48 | Wife | — | Italy |
| 77 | Rosalie Novelli | 22 | Daughter | Salesgirl | Illinois |
| 78 | Anthony Novelli | 21 | Son | Barber | Illinois |
| 79 | Jack Novelli | 19 | Son | Bus Boy | Illinois |
| 80 | William Novelli | 17 | Son | — | 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)