JH
John Hartman — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Erie, Pennsylvania
Our Model Tree links this John Hartman across the 1920 and 1930 US Censuses in Erie, Pennsylvania (XGBoost, ~Confirmed) — first a head (b.~1879), then head of a 10-person household.
Age 51
b. ~1879
Male
Head
Born: Pennsylvania
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Erie, Pennsylvania |
| Surname | Hartman |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Age at First Marriage | 23 |
| Father's Birthplace | Germany |
| Mother's Birthplace | Pennsylvania |
| Additional Details | |
| Occupation | Machinist |
| Industry | Railroad |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 26.00 |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Machinist |
| Township / Ward | Erie City |
| Est. Birth Year | ~1879 |
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.
10 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Georgiana Hartman | Daughter | — | 14 | ~1916 |
| Eva Hartman | Daughter | — | 15 | ~1915 |
| Clara Hartman | Daughter | — | 16 | ~1914 |
| Barbara Hartman | Daughter | — | 9 | ~1921 |
| John Hartman | Head | — | 51 | ~1879 |
| Josephine Hartman | Other | — | 51 | ~1879 |
| Bernard Hartman | Son | — | 4 | ~1926 |
| John Hartman | Son | — | 22 | ~1908 |
| William Hartman | Son | — | 12 | ~1918 |
| Edward Hartman | Son | — | 26 | ~1904 |
Census Appearances
1920
Erie, Pennsylvania
Head, age 41
Erie, Pennsylvania · implied b. ~1879 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hartman |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Father's Birthplace | Germany |
| Mother's Birthplace | Pennsylvania |
| Occupation | Laborer |
| Industry | Factory |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Erie, Pennsylvania
Head, age 51
Erie, Pennsylvania · implied b. ~1879 — 10 household members
| Surname | Hartman |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Age at First Marriage | 23 |
| Father's Birthplace | Germany |
| Mother's Birthplace | Pennsylvania |
| Occupation | Machinist |
| Industry | Railroad |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 26.00 |
| 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 Hartman across 2 US Census years (1920 and 1930) in Erie, Pennsylvania, using XGBoost record linkage.
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This person
Anchor record
John Hartman
Head · 1930 · age 51 · b. ~1879 · Pennsylvania
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Erie, Pennsylvania
Open full size
1930 US Federal Census — Erie, Pennsylvania
Page Contents
50 people indexed on this census page (ia:1930:fifteenthcensus00reel2036:0030)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Bertha Kroppy | 57 | Head-H | Coil Wrapper | Poland |
| 52 | Martha Kroppy | 21 | Daughter | — | Pennsylvania |
| 53 | Bertha Berger | 27 | Daughter | Shop Girl | Poland |
| 54 | Betty Jean Berger | 5 | Granddaughter | — | Pennsylvania |
| 55 | Mary Adams | 51 | Head-H | — | Pennsylvania |
| 56 | Albert Adams | 29 | Son | Shipping Clerk | Pennsylvania |
| 57 | Norman Adams | 26 | Son | Printer | Pennsylvania |
| 58 | Mildred Adams | 23 | Daughter | Stenographer | Pennsylvania |
| 59 | John Hartman THIS PERSON | 51 | Head | Machinist | Pennsylvania |
| 60 | Josephine Hartman | 51 | Wife-H | — | Pennsylvania |
| 61 | Edward Hartman | 26 | Son | — | Pennsylvania |
| 62 | John Hartman | 22 | Son | Inspector | Pennsylvania |
| 63 | Clara Hartman | 16 | Daughter | Servant | Pennsylvania |
| 64 | Eva Hartman | 15 | Daughter | — | Pennsylvania |
| 65 | Georgiana Hartman | 14 | Daughter | — | Pennsylvania |
| 66 | William Hartman | 12 | Son | — | Pennsylvania |
| 67 | Barbara Hartman | 9 | Daughter | — | Pennsylvania |
| 68 | Bernard Hartman | 4 | Son | — | Pennsylvania |
| 69 | John Lutz | 74 | Head | Cutter | South English |
| 70 | Frank Lutz | 44 | Son | Collector | New York |
| 71 | Mildred Lutz | 26 | Daughter | — | Pennsylvania |
| 72 | Henry Cofmanov | 55 | Head | Baker | Bohemia |
| 73 | Othil Cofmanov | 53 | Wife-H | Baker | Czeckoslovakia |
| 74 | Mary Cofmanov | 23 | Daughter | — | Czeckoslovakia |
| 75 | Charles And Cofmanov | 1 | Grandson | — | Pennsylvania |
| 76 | Clyde Lewis | 33 | Head | Service Manager | Pennsylvania |
| 77 | Edna Lewis | 31 | Wife-H | — | Pennsylvania |
| 78 | Lavilla Lewis | 10 | Daughter | — | Pennsylvania |
| 79 | Betty Lewis | 8 | Daughter | — | Pennsylvania |
| 80 | Robert Lewis | 6 | Son | — | Pennsylvania |
| 81 | Claude Fletcher | 39 | Head | Helper | West Virginia |
| 82 | Gertrude Fletcher | 35 | Wife-H | — | Virginia |
| 83 | Harriet Fletcher | 16 | Daughter | — | Maryland |
| 84 | Juanita Fletcher | 14 | Daughter | — | Maryland |
| 85 | Clyde Fletcher | 12 | Son | — | Maryland |
| 86 | James Fletcher | 10 | Son | — | Maryland |
| 87 | Louise Fletcher | 8 | Daughter | — | Maryland |
| 88 | Wanda Fletcher | 6 | Daughter | — | Maryland |
| 89 | Anthony Wiederle | 33 | Head | Oiler | Pennsylvania |
| 90 | Irene Wiederle | 33 | Wife-H | — | Pennsylvania |
| 91 | Catherine Wiederle | 6 | Daughter | — | Pennsylvania |
| 92 | Dorothy Wiederle | 3 | Daughter | — | Pennsylvania |
| 93 | Joseph Loboda | 43 | Head | Grinder | Austria |
| 94 | Julia Loboda | 43 | Wife-H | — | Austria |
| 95 | Joseph Loboda | 20 | Son | Attendant | Pennsylvania |
| 96 | John Loboda | 18 | Son | Grinder | Pennsylvania |
| 97 | Stephen Loboda | 16 | Son | Helper | Pennsylvania |
| 98 | George Loboda | 14 | Son | — | Pennsylvania |
| 99 | Catherine Loboda | 11 | Daughter | — | Pennsylvania |
| 100 | Helen Loboda | 10 | Daughter | — | Pennsylvania |
Related Census Records
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)