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John Mayer — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Philadelphia-County, Pennsylvania
Our Model Tree links this John Mayer across the 1930 and 1940 US Censuses in Philadelphia-County, Pennsylvania (XGBoost, ~Confirmed) — first a son (b.~1919), then head of a 9-person household.
Age 21
b. ~1919
Male
Son
Born: Penna.
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Philadelphia-County, Pennsylvania |
| Surname | Mayer |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Penna. |
| 1935 Residence (City) | Phila |
| 1935 Residence (County) | Phila |
| Additional Details | |
| Occupation | Office Clerk |
| Industry | Ins. Office |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 800 |
| Highest Grade | Hs 14 |
| 1935 Residence | Same House |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | penna |
| Occupation | Office Clerk |
| Township / Ward | Phila |
| Est. Birth Year | ~1919 |
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 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Irene Mayer | Daughter | — | 17 | ~1923 |
| Helen Mayer | Daughter | — | 19 | ~1921 |
| Martha Mayer | Daughter | — | 26 | ~1914 |
| George Mayer | Head | — | 61 | ~1879 |
| Albert Mayer | Son | — | 32 | ~1908 |
| John Mayer | Son | — | 21 | ~1919 |
| Harry Mayer | Son | — | 28 | ~1912 |
| Fred Mayer | Son | — | 23 | ~1917 |
| Pauline Mayer | Spouse | — | 60 | ~1880 |
Census Appearances
1930
Philadelphia, Pennsylvania
Son, age 11
Philadelphia, Pennsylvania · implied b. ~1919 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Moyer |
| Given Name | John A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Penna. |
| Father's Birthplace | Penna. |
| Mother's Birthplace | Penna. |
| Occupation | student |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | penna |
1940
Philadelphia-County, Pennsylvania
Son, age 21
Philadelphia-County, Pennsylvania · implied b. ~1919 — 9 household members
| Surname | Mayer |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Penna. |
| 1935 Residence (City) | Phila |
| 1935 Residence (County) | Phila |
| Occupation | Office Clerk |
| Industry | Ins. Office |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 800 |
| Highest Grade | Hs 14 |
| 1935 Residence | Same House |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | penna |
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 John Mayer across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Mayer
Son · 1940 · age 21 · b. ~1919 · Pennsylvania
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Sibling
Irene Mayer
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Martha Mayer
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Albert Mayer
Sibling · 1940 · age 32
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Harry Mayer
Sibling · 1940 · age 28
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Mayer
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Fred Mayer
Sibling · 1940 · age 23
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 — Philadelphia-County, Pennsylvania
Open full size
1940 US Federal Census — Philadelphia-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03714-00227)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John Berkelbach | 42 | Head | Fireman | Penna. |
| 2 | Caroline Berkelbach | 30 | Wife | — | Penna. |
| 3 | Delores Berkelbach | 5 | Daughter | — | Penna. |
| 4 | George Mayer | 61 | Head | — | Czecho-Slovakia |
| 5 | Pauline Mayer | 60 | Wife | — | Czecho-Slovakia |
| 6 | Albert Mayer | 32 | Son | Painter | Penna. |
| 7 | Harry Mayer | 28 | Son | Distributor | Penna. |
| 8 | Martha Mayer | 26 | Daughter | Office Clerk | Penna. |
| 9 | Fred Mayer | 23 | Son | Distributor | Penna. |
| 10 | John Mayer THIS PERSON | 21 | Son | Office Clerk | Penna. |
| 11 | Helen Mayer | 19 | Daughter | — | Penna. |
| 12 | Irene Mayer | 17 | Daughter | — | Penna. |
| 13 | Louis Jacobs | 45 | Head | Engineer | Penna. |
| 14 | Eleanor Jacobs | 29 | Wife | — | Syria |
| 15 | Louise Jacobs | 12 | Daughter | — | Penna. |
| 16 | Anna Jacobs | 10 | Daughter | — | Penna. |
| 17 | Margaret Lohr | 58 | Head | Dressmaker | Penna. |
| 18 | Anna Lohr | 57 | Sister | — | Penna. |
| 19 | William E. Stark | 62 | Lodger | Truck Driver | Penna. |
| 20 | Henry P. Hurley | 47 | Head | General Helper | Nova Scotia |
| 21 | Katherine R. Hurley | 43 | Wife | — | Penna. |
| 22 | Eliz. Hurley | 15 | Daughter | — | Penna. |
| 23 | Alice Hurley | 13 | Daughter | — | Penna. |
| 24 | Richard J. Hurley | 53 | Brother | Painter | Nova Scotia |
| 25 | Louis Rouleau | 71 | Father in Law | Paper Carrier | Penna. |
| 26 | William Killinger | 57 | Head | Singer | Penna. |
| 27 | May Killinger | 50 | Wife | — | Penna. |
| 28 | William J. Killinger | 27 | Son | Painter | New York |
| 29 | John Killinger | 20 | Son | Butcher | Penna. |
| 30 | Mary Killinger | 18 | Daughter | — | Penna. |
| 31 | Edward Killinger | 16 | Son | — | Penna. |
| 32 | George Killinger | 12 | Son | — | Penna. |
| 33 | Patricia Killinger | 7 | Daughter | — | Penna. |
| 34 | Harry Eisenberg | 28 | Lodger | Butcher | Penna. |
| 35 | Joseph Eisenberg | 25 | Lodger | Sign Painter | Penna. |
| 36 | John Booker | 63 | Head | Janitor | Virginia |
| 37 | Janette Booker | 40 | Wife | — | Penna. |
| 38 | John Booker | 24 | Son | — | Penna. |
| 39 | Andrew Booker | 20 | Son | News Worker | Penna. |
| 40 | Eliz. Booker | 85 | Mother | — | Virginia |
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)