JK
John Kirk — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Philadelphia-County, Pennsylvania
Our Model Tree links this John Kirk across the 1930 and 1940 US Censuses in Philadelphia-County, Pennsylvania (XGBoost, ~Confirmed) — first a son (b.~1922), then head of a 6-person household.
Age 18
b. ~1922
Male
Son
Born: Penna
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Philadelphia-County, Pennsylvania |
| Surname | Kirk |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Penna |
| 1935 Residence (City) | Philadelphia |
| 1935 Residence (County) | Philadelphia |
| Additional Details | |
| Occupation | Office Boy |
| Industry | Printing Shop |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 14 |
| Highest Grade | H 3 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | penna |
| Occupation | Office Boy |
| Township / Ward | Philadelphia |
| Est. Birth Year | ~1922 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Edward Kirk | Head | — | 52 | ~1888 |
| Elizabeth Kirk | Spouse | — | 45 | ~1895 |
| Charles Kirk | Son | — | 14 | ~1926 |
| John Kirk | Son | — | 18 | ~1922 |
| Thomas Kirk | Son | — | 11 | ~1929 |
| Mary Kirk | Daughter | — | 8 | ~1932 |
Census Appearances
1930
Phila, Pennsylvania
Other, age 7
Phila, Pennsylvania · implied b. ~1923 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kirk |
| Given Name | John Jr. |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Penna. |
| Father's Birthplace | Penna. |
| Mother's Birthplace | Penna. |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | penna |
1940
Philadelphia-County, Pennsylvania
Son, age 18
Philadelphia-County, Pennsylvania · implied b. ~1922 — 6 household members
| Surname | Kirk |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Penna |
| 1935 Residence (City) | Philadelphia |
| 1935 Residence (County) | Philadelphia |
| Occupation | Office Boy |
| Industry | Printing Shop |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 14 |
| Highest Grade | H 3 |
| 1935 Residence | Same place |
| 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 Kirk across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Kirk
Son · 1940 · age 18 · b. ~1922 · Pennsylvania
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Sibling
Thomas Kirk
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Kirk
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Kirk
Sibling · 1940 · age 14
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-t0627-03737-00189)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Virginia Peck | 11 | Daughter | — | Penna |
| 42 | Robert Peck | 7 | Son | — | Penna |
| 43 | Alfred W Geary | 36 | Head | Roof Maker | Penna |
| 44 | Mildred Geary | 34 | Wife | — | Penna |
| 45 | Alfred Jr Geary | 15 | Son | — | Penna |
| 46 | Eugene Geary | 7 | Son | — | Penna |
| 47 | Edward Geary | 2 | Son | — | Penna |
| 48 | Margaret M Geary | 67 | Mother | — | Penna |
| 49 | Edward Kirk | 52 | Head | Blacksmith | Penna |
| 50 | Elizabeth Kirk | 45 | Wife | — | Penna |
| 51 | John Kirk THIS PERSON | 18 | Son | Office Boy | Penna |
| 52 | Charles Kirk | 14 | Son | — | Penna |
| 53 | Thomas Kirk | 11 | Son | — | Penna |
| 54 | Mary Kirk | 8 | Daughter | — | Penna |
| 55 | John Mahoney | 72 | Head | — | Ireland |
| 56 | Catherine Mahoney | 70 | Wife | Waiter | Ireland |
| 57 | Walter Mahoney | 35 | Son | — | Penna |
| 58 | Edwine Mahoney | 27 | Son | Metal Worker | Penna |
| 59 | Joseph Wharton | 66 | Head | Waiter | Penna |
| 60 | George Wharton | 29 | Son | Store Attend. | Penna |
| 61 | Charles Wharton | 21 | Son | Machine Oper. | Penna |
| 62 | Elizabeth Wharton | 19 | Daughter | — | Penna |
| 63 | George Kelly | 31 | Son in law | Iron Worker | Penna |
| 64 | Helen Kelly | 34 | Daughter | Machine Oper. | Penna |
| 65 | Harold Limo | 26 | Head | Brew. Filler | Penna |
| 66 | Jennie Limo | 36 | Wife | Laborer | Penna |
| 67 | Anna Limo | 11 | Daughter | — | Penna |
| 68 | Dolores Limo | 4 | Daughter | — | Penna |
| 69 | Joan Limo | 2 | Daughter | — | Penna |
| 70 | Francis Huhn | 25 | Head | Stock Clerk | Penna |
| 71 | Helen Huhn | 22 | Wife | — | Penna |
| 72 | Helen Huhn | 2 | Daughter | — | Penna |
| 73 | Joseph Huhn | 1 | Son | — | Penna |
| 74 | John H Mullin | 75 | Head | — | Penna |
| 75 | Mary F Mullin | 45 | Daughter | — | Penna |
| 76 | Rosalie Mullin | 40 | Daughter | Operator | Penna |
| 77 | James Jos Ruddle | 69 | Head | — | Penna |
| 78 | Elizabeth A Ruddle | 70 | Wife | — | Penna |
| 79 | Edward T Ruddle | 36 | Son | Clerk | Penna |
| 80 | Eugene J Ruddle | 27 | Son | Clerk-Sub | Penna |
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)