JW
John Welsh — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Philadelphia-County, Pennsylvania
Our Model Tree links this John Welsh across the 1930 and 1940 US Censuses in Philadelphia-County, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1906), then head of a 3-person household.
Age 34
b. ~1906
Male
Head
Born: Pennsylvania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Philadelphia-County, Pennsylvania |
| Surname | Welsh |
| Given Name | John P. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Philadelphia |
| 1935 Residence (County) | Philadelphia |
| Additional Details | |
| Occupation | Lawyer |
| Industry | Law |
| Class of Worker | OA |
| Hours Worked | 55 |
| Income (1939) | 0 |
| Highest Grade | C 4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Lawyer |
| Township / Ward | Philadelphia |
| Est. Birth Year | ~1906 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Welsh | Head | — | 34 | ~1906 |
| Mildred Welsh | Spouse | — | 25 | ~1915 |
| Mary Welsh | Daughter | — | 1 | ~1939 |
Census Appearances
1930
Philadelphia, Pennsylvania
Head, age 25
Philadelphia, Pennsylvania · implied b. ~1905 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Walsh |
| Given Name | John P |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Age at First Marriage | 21 |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | France |
| Occupation | Clerk |
| Industry | Oil Refining |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 40 |
| Radio Set | R |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Philadelphia-County, Pennsylvania
Head, age 34
Philadelphia-County, Pennsylvania · implied b. ~1906 — 3 household members
| Surname | Welsh |
| Given Name | John P. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Philadelphia |
| 1935 Residence (County) | Philadelphia |
| Occupation | Lawyer |
| Industry | Law |
| Class of Worker | OA |
| Hours Worked | 55 |
| Income (1939) | 0 |
| Highest Grade | C 4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 Welsh across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Welsh
Head · 1940 · age 34 · b. ~1906 · Pennsylvania
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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-t0627-03692-00125)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Rosario Scalera | 69 | Head | Music Teacher | Italy |
| 42 | Joseph M. Casey | 47 | Head | Manager | Pennsylvania |
| 43 | Gertrude V. Casey | 44 | Wife | — | Pennsylvania |
| 44 | Alfred Mann | 49 | Head | Manufacturer | Pennsylvania |
| 45 | Sara Mann | 72 | Mother | — | Maryland |
| 46 | Solomon Sickles | 63 | Head | Wholesale Jeweler | Philadelphia |
| 47 | Rose B. Sickles | 63 | Wife | — | Philadelphia |
| 48 | Emma Roszkam | 70 | Head | — | Germany |
| 49 | Clara Marcus | 49 | Head | — | Pennsylvania |
| 50 | Leon Marcus | 25 | Son | Photographer | Pennsylvania |
| 51 | Dickerson J. Marten | 48 | Head | Engineer | Virginia |
| 52 | Florana R. Marten | 40 | Wife | — | Ohio |
| 53 | Virginia D. Marten | 18 | Daughter | — | Pennsylvania |
| 54 | Herbert D. Alman | 77 | Head | — | Pennsylvania |
| 55 | Mildred N. Alman | 70 | Wife | — | Pennsylvania |
| 56 | Francis W. Sullivan | 38 | Head | Lawyer | Pennsylvania |
| 57 | Gerald A. Sullivan | 22 | Brother | — | Pennsylvania |
| 58 | Anna Munzer | 45 | Head | Teacher Spanish | Austria |
| 59 | Lee P. Kaufman | 43 | Head | Executive | New York |
| 60 | Gladys S. Kaufman | 43 | Wife | — | Philadelphia |
| 61 | Hilda B. Berg | 62 | Head | — | Philadelphia |
| 62 | Martha E. Shalock | 56 | Maid | Housekeeper | Philadelphia |
| 63 | John P. Welsh THIS PERSON | 34 | Head | Lawyer | Pennsylvania |
| 64 | Mildred J. Welsh | 25 | Wife | — | Pennsylvania |
| 65 | Mary Ellen Welsh | 1 | Daughter | — | Pennsylvania |
| 66 | Arthur Loeb | 67 | Head | — | Indiana |
| 67 | Emma J. Loeb | 60 | Wife | — | Pennsylvania |
| 68 | Elizabeth Hayes | 40 | Servant | Cook | New Ireland |
| 69 | Ellen Lundgren | 41 | Servant | Maid | Pennsylvania |
| 70 | Rosemary D. Kramer | 60 | Head | — | Iowa |
| 71 | Theodore R. Tetter | 37 | Head | Physician | Pennsylvania |
| 72 | Mary A. Sellers | 45 | Head | Executive | Pennsylvania |
| 73 | Mary Whelan | 65 | Lodger | Asst Housekeeper | New Jersey |
| 74 | Clara W. Thacker | 69 | Head | — | Philadelphia |
| 75 | Elmer F. Guthrie | 53 | Head | Executive | Iowa |
| 76 | Sadie F. Guthrie | 41 | Wife | — | Pennsylvania |
| 77 | Walter R. Whalen | 41 | Head | Broker | Massachusetts |
| 78 | Annie Butterworth | 72 | Head | — | Philadelphia |
| 79 | Caroline Spencer Johnston | 76 | Head | — | Michigan |
| 80 | Rose Glazer | 81 | Head | — | — |
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)