JH
John Harper — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Montgomery-County, Pennsylvania
Our Model Tree links this John Harper across the 1920, 1930 and 1940 US Censuses in Montgomery-County, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1909), then head of a 3-person household.
Age 31
b. ~1909
Male
Head
Born: New Jersey
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Montgomery-County, Pennsylvania |
| Surname | Harper |
| Given Name | John W. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | New Jersey |
| 1935 Residence (City) | Lansdale Boro |
| 1935 Residence (County) | Montgomery |
| Additional Details | |
| Occupation | Clerk |
| Industry | Steam Railway |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1600 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Clerk |
| Township / Ward | Lansdale Boro |
| Est. Birth Year | ~1909 |
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 |
|---|---|---|---|---|
| Margaret Harper | Daughter | — | 5 | ~1935 |
| John Harper | Head | — | 31 | ~1909 |
| Margaret Harper | Spouse | — | 33 | ~1907 |
Census Appearances
1920
Montgomery, Pennsylvania
Other, age 12
Montgomery, Pennsylvania · implied b. ~1908 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harper |
| Given Name | John W. |
| Relationship to Head | Nephew |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1930
Montgomery, Pennsylvania
Other, age 21
Montgomery, Pennsylvania · implied b. ~1909 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harper |
| Given Name | John W. |
| Relationship to Head | Nephew |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | Canada-English |
| Mother's Birthplace | England |
| Occupation | Clerk |
| Industry | Railroad |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Montgomery-County, Pennsylvania
Head, age 31
Montgomery-County, Pennsylvania · implied b. ~1909 — 3 household members
| Surname | Harper |
| Given Name | John W. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | New Jersey |
| 1935 Residence (City) | Lansdale Boro |
| 1935 Residence (County) | Montgomery |
| Occupation | Clerk |
| Industry | Steam Railway |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1600 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
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 Harper across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Harper
Head · 1940 · age 31 · b. ~1909 · 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 — Montgomery-County, Pennsylvania
Open full size
1940 US Federal Census — Montgomery-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03579-00406)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Abram C. Jr. Detwiler | 10 | Son | — | Pennsylvania |
| 2 | Paul L. Detwiler | 44 | Head | Mail Carrier | Pennsylvania |
| 3 | Naomi R. Detwiler | 42 | Wife | — | Pennsylvania |
| 4 | Paul R. Detwiler | 17 | Son | — | Pennsylvania |
| 5 | Inez R. Detwiler | 16 | Daughter | — | Pennsylvania |
| 6 | J. William Kugler | 61 | Head | Laborer | Pennsylvania |
| 7 | Minerva R. Kugler | 63 | Wife | — | Pennsylvania |
| 8 | Durrell W. Webster | 32 | Step-son | Laborer | Pennsylvania |
| 9 | Milton W. Kessler | 44 | Head | Salesman | Pennsylvania |
| 10 | Elyda R. Kessler | 36 | Wife | — | Pennsylvania |
| 11 | Milton W. Jr. Kessler | 5 | Son | — | Pennsylvania |
| 12 | David C. Kessler | 3 | Son | — | Pennsylvania |
| 13 | Russell M. Swartley | 37 | Head | Office Manager | Pennsylvania |
| 14 | Frances M. Swartley | 36 | Wife | — | Pennsylvania |
| 15 | Kay F. Swartley | 11 | Daughter | — | Pennsylvania |
| 16 | Ethel Swartley | 41 | Sister-in-law | Seamstress | Pennsylvania |
| 17 | John M. Krupp | 31 | Head | Treasurer | Pennsylvania |
| 18 | Beatrice H. Krupp | 29 | Wife | — | Pennsylvania |
| 19 | Lester S. Hart | 30 | Head | Boarder | Pennsylvania |
| 20 | Eva E. Hart | 25 | Wife | Examiner | Massachusetts |
| 21 | David S. Hart | 4 | Son | — | Connecticut |
| 22 | George L. Clayton | 39 | Head | Service Clerk | Pennsylvania |
| 23 | Frances V. Clayton | 36 | Wife | — | Pennsylvania |
| 24 | Nancy J. Clayton | 8 | Daughter | — | Pennsylvania |
| 25 | Edward P. Thuman | 41 | Head | Meat Cutter | Pennsylvania |
| 26 | Edna R. Thuman | 43 | Wife | — | Pennsylvania |
| 27 | Andrew M. Burds | 27 | Head | Clerk | Pennsylvania |
| 28 | Florence C. Burds | 25 | Wife | — | Pennsylvania |
| 29 | Mary A. Burds | 2 | Daughter | — | Pennsylvania |
| 30 | Isaac S. Rosenberger | 67 | Head | Proprietor | Pennsylvania |
| 31 | Caroline R. Rosenberger | 50 | Wife | — | Pennsylvania |
| 32 | John W. Harper THIS PERSON | 31 | Head | Clerk | New Jersey |
| 33 | Margaret F. Harper | 33 | Wife | — | Pennsylvania |
| 34 | Margaret S. Harper | 5 | Daughter | — | Pennsylvania |
| 35 | Edward S. Toman | 39 | Head | Service Manager | Pennsylvania |
| 36 | Cora M. Toman | 38 | Wife | — | Pennsylvania |
| 37 | R. Jean Toman | 14 | Daughter | — | Pennsylvania |
| 38 | Katherine S. Toman | 9 | Daughter | — | Pennsylvania |
| 39 | Mary A. Mac Neal | 18 | Niece | — | Florida |
| 40 | Milton D. Keppa | 29 | Head | Steel Worker | New Jersey |
Related Census Records
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)