JM
Joseph Mayer — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Joseph Mayer across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1890), then head of a 5-person household.
Age 50
b. ~1890
Male
Head
Born: Austria
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Mayer |
| Given Name | Joseph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Austria |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Tailor |
| Industry | Private Tailoring |
| Class of Worker | PW |
| Hours Worked | 72 |
| Income (1939) | 452 |
| Highest Grade | 6 |
| 1935 Residence | Same Place |
| Birth Country | Austria |
| Birthplace (normalized) | austria |
| Occupation | Tailor |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1890 |
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 1940 census.
| Name | Relation to head | Relative to Joseph | Age | Birth yr |
|---|---|---|---|---|
| Edward Mayer | Son | — | 26 | ~1914 |
| Margaret Mayer | Spouse | — | 47 | ~1893 |
| Joseph Mayer | Head | — | 50 | ~1890 |
| Margaret Mayer | Daughter | — | 13 | ~1927 |
| Ellert Mayer | Son | — | 23 | ~1917 |
Census Appearances
1920
Macoupin, Illinois
Head, age 33
Macoupin, Illinois · implied b. ~1887 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mayer |
| Given Name | Joseph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Austria |
| Father's Birthplace | Austria |
| Mother's Birthplace | Austria |
| Occupation | Miner |
| Industry | Coal Mine |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | German |
| Birth Country | Austria |
| Year of Naturalization | R |
| Birthplace (normalized) | austria |
1930
Cook, Illinois
Head, age 43
Cook, Illinois · implied b. ~1887 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mayer |
| Given Name | Joseph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Austria |
| Naturalization Status | Naturalized |
| Year of Immigration | 1913 |
| Age at First Marriage | 27 |
| Father's Birthplace | Austria |
| Mother's Birthplace | Austria |
| Occupation | Janitor |
| Industry | Apt. Building |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | German |
| Home Owned/Rented | R |
| Radio Set | R |
| Birth Country | Austria |
| Birthplace (normalized) | austria |
1940
Cook-County, Illinois
Head, age 50
Cook-County, Illinois · implied b. ~1890 — 5 household members
| Surname | Mayer |
| Given Name | Joseph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Austria |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Occupation | Tailor |
| Industry | Private Tailoring |
| Class of Worker | PW |
| Hours Worked | 72 |
| Income (1939) | 452 |
| Highest Grade | 6 |
| 1935 Residence | Same Place |
| Birth Country | Austria |
| Birthplace (normalized) | austria |
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 Joseph Mayer across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Joseph Mayer
Head · 1940 · age 50 · b. ~1890 · Illinois
★ You are viewing this record
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-t0627-01000-00493)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Gertrude E Pfaff | 15 | Daughter | — | Illinois |
| 42 | Richard F Pfaff | 8 | Son | — | Illinois |
| 43 | Robert J Mac Lagen | 22 | Head | Draftsman | Illinois |
| 44 | Beverly B Mac Lagen | 22 | Wife | — | Illinois |
| 45 | Robert J Mac Lagen | 2 | Son | — | Illinois |
| 46 | Donald J Mac Lagen | 1 | Son | — | Illinois |
| 47 | Arthur J Janer | 29 | Head | Lawyer | Illinois |
| 48 | Jean M Janer | 29 | Wife | — | England |
| 49 | John J Mc Carthy | 40 | Head | Electrician | Illinois |
| 50 | Verona M Mc Carthy | 37 | Wife | — | Illinois |
| 51 | Verona M Mc Carthy | 11 | Daughter | — | Illinois |
| 52 | Jeannene A Mc Carthy | 9 | Daughter | — | Illinois |
| 53 | William F Strutzberg | 35 | Head | Assistant Foreman | Illinois |
| 54 | Gertrude A Strutzberg | 29 | Wife | — | Illinois |
| 55 | Joan Strutzberg | 11 | Daughter | — | Illinois |
| 56 | Patricia Strutzberg | 3 | Daughter | — | Illinois |
| 57 | John W Gleason | 52 | Head | Traveling Mechanic | Missouri |
| 58 | Regina Gleason | 44 | Wife | — | Missouri |
| 59 | Ellwyn O Gleason | 23 | Son | Draftsman | Missouri |
| 60 | Francis B Gleason | 19 | Daughter | — | Missouri |
| 61 | Michl B Warner | 32 | Head | Machinist | Germany |
| 62 | Martha H Warner | 30 | Sister | Bookkeeping | Germany |
| 63 | Francis M Warner | 20 | Sister | — | Illinois |
| 64 | Joseph Mayer THIS PERSON | 50 | Head | Tailor | Austria |
| 65 | Margaret Mayer | 47 | Wife | — | Hungary |
| 66 | Edward J P Mayer | 26 | Son | General Office | Illinois |
| 67 | Ellert H Mayer | 23 | Son | Service Man | Illinois |
| 68 | Margaret M N A Mayer | 13 | Daughter | — | Illinois |
| 69 | Lawrence R Gilman | 38 | Head | Service Station Attendant | New York |
| 70 | Elsie L Gilman | 43 | Wife | — | Illinois |
| 71 | Phyllis E Gilman | 11 | Daughter | — | Illinois |
| 72 | Charlotte J Gilman | 6 | Daughter | — | Illinois |
| 73 | Ervin J Spier | 24 | Head | Delicatessen | Illinois |
| 74 | Velma B Spier | 19 | Wife | — | Illinois |
| 75 | Irvin A Tholen | 29 | Head | Deputy Sheriff | Illinois |
| 76 | Charlene B Tholen | 21 | Wife | Beauty Operator | Illinois |
| 77 | John H Slattery | 32 | Head | Musician | Illinois |
| 78 | Lillian M Slattery | 34 | Wife | Musician | Illinois |
| 79 | John H Jr. Slattery | 12 | Son | — | Illinois |
| 80 | Donald K Slattery | 9 | Son | — | Illinois |
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)