JI
John Irwin — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Philadelphia-County, Pennsylvania
Our Model Tree links this John Irwin across the 1930 and 1940 US Censuses in Philadelphia-County, Pennsylvania (XGBoost, ~Confirmed) — first a son (b.~1928), then head of a 7-person household.
Age 12
b. ~1928
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Philadelphia-County, Pennsylvania |
| Surname | Irwin |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Drexel Hill |
| 1935 Residence (County) | Del. |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | 6 |
| 1935 Residence | Penna |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Phila |
| Est. Birth Year | ~1928 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Edw Irwin | Head | — | 37 | ~1903 |
| Edward Irwin | Son | — | 15 | ~1925 |
| Nancy Irwin | Spouse | — | 38 | ~1902 |
| John Irwin | Son | — | 12 | ~1928 |
| Esther Irwin | Daughter | — | 13 | ~1927 |
| Charles Irwin | Son | — | 8 | ~1932 |
| Joseph Irwin | Son | — | 4 | ~1936 |
Census Appearances
1930
Montgomery, Pennsylvania
Son, age 1
Montgomery, Pennsylvania · implied b. ~1929 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Irwin |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Philadelphia-County, Pennsylvania
Son, age 12
Philadelphia-County, Pennsylvania · implied b. ~1928 — 7 household members
| Surname | Irwin |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Drexel Hill |
| 1935 Residence (County) | Del. |
| Income (1939) | 0 |
| Highest Grade | 6 |
| 1935 Residence | Penna |
| 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 Irwin across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Irwin
Son · 1940 · age 12 · b. ~1928 · Pennsylvania
★ You are viewing this record
Sibling
Edward Irwin
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Irwin
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Esther Irwin
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Irwin
Sibling · 1940 · age 4
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-t0627-03749-00795)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Alice H. Sinclair | 33 | Wife | — | Pennsylvania |
| 42 | Mary Paley | 50 | Head | Saleslady | New York |
| 43 | Blanche Paley | 30 | Daughter | Stenog. | New York |
| 44 | Frederick Milden | 31 | Head | Broker | Pennsylvania |
| 45 | Florence Milden | 28 | Wife | — | Pennsylvania |
| 46 | Patricia Anne Milden | 1 | Daughter | — | Pennsylvania |
| 47 | Sarah Munce | 50 | Head | Teacher | Pennsylvania |
| 48 | Julia M. Ernshaw | 52 | Sister | — | Pennsylvania |
| 49 | Cathryn M. Munce | 44 | Sister | Cashier | Pennsylvania |
| 50 | Edw. J. Irwin | 37 | Head | Salesman | Pennsylvania |
| 51 | Nancy J. Irwin | 38 | Wife | — | Pennsylvania |
| 52 | Edward J. Irwin | 15 | Son | — | Pennsylvania |
| 53 | Esther Ann Irwin | 13 | Daughter | — | Pennsylvania |
| 54 | John Irwin THIS PERSON | 12 | Son | — | Pennsylvania |
| 55 | Charles Irwin | 8 | Son | — | Pennsylvania |
| 56 | Joseph Irwin | 4 | Son | — | Pennsylvania |
| 57 | Beryl Van Osten | 50 | Head | — | Pennsylvania |
| 58 | Henry Van Osten | 27 | Son | Attendant | Pennsylvania |
| 59 | Florence Van Osten | 37 | Daughter-in-law | — | Canada English |
| 60 | Willard A. Van Osten | 3 | Grandson | — | Pennsylvania |
| 61 | Robert Reeder | 27 | Head | Elec. Welder | New Jersey |
| 62 | Mary Reeder | 24 | Wife | Teacher | Pennsylvania |
| 63 | George Doe | 58 | Head | — | Pennsylvania |
| 64 | Bertha M. Goodwin | 55 | Head | — | Rhode Island |
| 65 | Archer M. Goodwin | 30 | Son | Engineer | New York |
| 66 | W. H. Burrows | 70 | Head | — | Pennsylvania |
| 67 | Mary L. Burrows | 70 | Wife | — | Pennsylvania |
| 68 | Charles C. Burrows | 40 | Son | Clerk | Pennsylvania |
| 69 | Mary L. Burrows | 36 | Daughter | — | Pennsylvania |
| 70 | Hilda Burrows | 35 | Daughter | Stenog. | Pennsylvania |
| 71 | Annie Simonds | 77 | Head | — | Mass. |
| 72 | Fannie Simonds | 52 | Daughter | — | New Jersey |
| 73 | Mercedes Simonds | 50 | Daughter | Secretary | New Jersey |
| 74 | William C. Ryan | 57 | Head | Medical Dr. | New York |
| 75 | Nellie M. Ryan | 56 | Wife | — | Maryland |
| 76 | William J. Ryan | 25 | Son | — | Pennsylvania |
| 77 | Mary H. Wagner | 74 | Head | — | Pennsylvania |
| 78 | Roy C. Baker | 48 | Head | Credit Mgr. | Pennsylvania |
| 79 | Eleanor Baker | 43 | Wife | Asst. Buyer | Pennsylvania |
| 80 | Elsie Weger | 33 | Head | Stenog. | Pennsylvania |
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)