RD
Robert Day — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Cook, Illinois
Our Model Tree links this Robert Day across the 1910, 1920 and 1930 US Censuses in Cook, Illinois (XGBoost, ~Confirmed) — first a head (b.~1888), then head of a 4-person household.
Age 42
b. ~1888
Male
Head
Born: Illinois
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Cook, Illinois |
| Surname | Day |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 21 |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Additional Details | |
| Occupation | Operator |
| Industry | Telegraphy |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 70.00 |
| Radio Set | R |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Operator |
| Township / Ward | Chicago City |
| 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.
4 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Robert Day | Son | — | ~1930 | |
| Robert Day | Head | — | 42 | ~1888 |
| Evelyn Day | Daughter | — | 20 | ~1910 |
| Verna Day | Other | — | 35 | ~1895 |
Census Appearances
1910
Cook, Illinois
Other, age 23
Cook, Illinois · implied b. ~1887 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Day |
| Given Name | Robert H. |
| Relationship to Head | Son-in-law |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Married |
| Birthplace | Illinois |
| Years Married | 1 |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Telegrapher |
| Industry | Rail Road |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1920
Cook, Illinois
Head, age 32
Cook, Illinois · implied b. ~1888 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Day |
| Given Name | Robert Emmett |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Teller |
| Industry | Bank |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Head, age 42
Cook, Illinois · implied b. ~1888 — 4 household members
| Surname | Day |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 21 |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Operator |
| Industry | Telegraphy |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 70.00 |
| Radio Set | R |
| 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 Day across 3 US Census years (1910, 1920 and 1930) in Cook, Illinois, using XGBoost record linkage.
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This person
Anchor record
Robert Day
Head · 1930 · age 42 · b. ~1888 · Illinois
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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
49 people indexed on this census page (ia:1930:illinoiscensus00reel449:0707)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | George D. Hood | 47 | Head | Superintendent | Canada English |
| 2 | Clara Hood | 38 | Wife-H | — | Indiana |
| 3 | Fulton S. King | 42 | Head | Salesman | Tennessee |
| 4 | Bess King | 35 | Wife-H | — | Illinois |
| 5 | Robert King | 15 | Son | — | Illinois |
| 6 | Robert Day THIS PERSON | 42 | Head | Operator | Illinois |
| 7 | Verna Day | 35 | Wife-H | — | Illinois |
| 8 | Evelyn Day | 20 | Daughter | Auditing | Illinois |
| 9 | Robert R. Day | 0 | Son | — | Illinois |
| 10 | Fred N. Bellenbach | 32 | Head | Mechanic | Illinois |
| 11 | Ruth Bellenbach | 23 | Wife-H | — | Illinois |
| 12 | Fred Jr. Bellenbach | 1 | Son | — | Illinois |
| 13 | Bryce R. Bellenbach | 0 | Son | — | Illinois |
| 14 | Henry Bellenbach | 70 | Head | Foreman | Germany |
| 15 | Caroline Bellenbach | 67 | Wife-H | — | Germany |
| 16 | Almeda H. Mckilnay | 63 | Head | Attorney | Illinois |
| 17 | Anna Mckilnay | 62 | Wife-H | — | Illinois |
| 18 | Mary Campbell | 66 | Head-H | — | Maryland |
| 19 | Helen C. Campbell | 36 | Daughter | Vocational Advisor | Pennsylvania |
| 20 | Henry E. Sinclair | 60 | Head | Fruit Grower | England |
| 21 | Evelyn Sinclair | 57 | Wife-H | — | Illinois |
| 22 | Allen S. Husted | 50 | Cousin | Clerical | Illinois |
| 23 | Edward B. Roth | 66 | Head | Salesman | Pennsylvania |
| 24 | Marie Roth | 58 | Wife-H | — | Illinois |
| 25 | Marshall S. Roth | 26 | Son | Army Officer | Illinois |
| 26 | James Hubbell | 48 | Head | Broker | Canada English |
| 27 | Nellie Hubbell | 49 | Wife-H | — | Michigan |
| 28 | Elizabeth Ricker | 72 | Mother-in-law | — | Illinois |
| 29 | Montrose R. Hubbell | 15 | Daughter | — | Illinois |
| 30 | Alice Munger | 64 | Aunt | — | Michigan |
| 31 | Henry H. Schubler | 50 | Head | Manager | Illinois |
| 32 | Martha B. Schubler | 50 | Wife-H | — | Ohio |
| 33 | Martha P. Schubler | 25 | Daughter | Operator | Illinois |
| 34 | Georgiana B. Schubler | 23 | Daughter | — | Illinois |
| 35 | Herbert W. Schubler | 21 | Son | Apprentice | Michigan |
| 36 | Henry H. Schubler | 20 | Son | Mechanic | Michigan |
| 37 | Joe C. Schubler | 15 | Son | — | Illinois |
| 38 | George C. Peterson | 32 | Head | Manager | Illinois |
| 39 | Agnes Peterson | 31 | Wife-H | — | Illinois |
| 40 | Violet Peterson | 11 | Daughter | — | Illinois |
| 41 | Eugene Celia | 35 | Head | Appraiser | Montana |
| 42 | Beatrice Celia | 39 | Wife-H | — | Minnesota |
| 43 | Gustave H. Deakman | 67 | Head | Salesman | Illinois |
| 44 | Elizabeth Deakman | 66 | Wife-H | — | Massachusetts |
| 45 | Marjorie Deakman | 31 | Daughter | Stenographer | Illinois |
| 46 | James Cunningham | 38 | Head | Proprietor | Illinois |
| 47 | Madeline F. Cunningham | 34 | Wife-H | Bookkeeper | New York |
| 49 | Francis H. Nichols | 43 | Head | Physician | Ohio |
| 50 | Gertrude Nichols | 43 | Wife-H | — | 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)