JH
John Hahn — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Washington-County, Maryland
Our Model Tree links this John Hahn across the 1930 and 1940 US Censuses in Washington-County, Maryland (XGBoost, ~Confirmed) — first a head (b.~1899), then head of a 6-person household.
Age 41
b. ~1899
Male
Head
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Washington-County, Maryland |
| Surname | Hahn |
| Given Name | John L. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Election District 14-1 |
| 1935 Residence (County) | Washington |
| Additional Details | |
| Occupation | General work |
| Industry | Military Reservation |
| Class of Worker | GW |
| Hours Worked | 65 |
| Income (1939) | 490 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | General Work |
| Township / Ward | Election District 141 |
| Est. Birth Year | ~1899 |
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 |
|---|---|---|---|---|
| Yvonne Hahn | Daughter | — | 4 | ~1936 |
| Verona Hahn | Daughter | — | 10 | ~1930 |
| John Hahn | Head | — | 41 | ~1899 |
| Naomia Hahn | Spouse | — | 37 | ~1903 |
| Wanda Hahn | Daughter | — | 6 | ~1934 |
| Lanona Hahn | Daughter | — | 15 | ~1925 |
Census Appearances
1930
Washington, Maryland
Head, age 31
Washington, Maryland · implied b. ~1899 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hahn |
| Given Name | John L |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Maryland |
| Age at First Marriage | 23 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Pennsylvania |
| Occupation | Painter |
| Industry | House Paint |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 700 |
| Veteran | No |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Washington-County, Maryland
Head, age 41
Washington-County, Maryland · implied b. ~1899 — 6 household members
| Surname | Hahn |
| Given Name | John L. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Election District 14-1 |
| 1935 Residence (County) | Washington |
| Occupation | General work |
| Industry | Military Reservation |
| Class of Worker | GW |
| Hours Worked | 65 |
| Income (1939) | 490 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
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 Hahn across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Hahn
Head · 1940 · age 41 · b. ~1899 · Maryland
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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 — Washington-County, Maryland
Open full size
1940 US Federal Census — Washington-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01562-00493)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Helma R. Carbaugh | 25 | Wife | — | Pennsylvania |
| 42 | Clarence E. Carbaugh | 8 | Son | — | Pennsylvania |
| 43 | Harry A. Carbaugh | 7 | Son | — | Pennsylvania |
| 44 | Mary E. Carbaugh | 3 | Daughter | — | Pennsylvania |
| 45 | Charles L. Carbaugh | 2 | Son | — | Maryland |
| 46 | Harold J. Carbaugh | 1 | Son | — | Maryland |
| 47 | Clarence F. Omich | 46 | Head | General Work | Maryland |
| 48 | Levia N. Omich | 35 | Wife | — | Maryland |
| 49 | Lewis D. Omich | 16 | Son | General Work | Maryland |
| 50 | Irene E. Omich | 15 | Daughter | — | Maryland |
| 51 | Merrick W. Omich | 8 | Son | — | Maryland |
| 52 | John L. Hahn THIS PERSON | 41 | Head | General Work | Maryland |
| 53 | Naomia A. Hahn | 37 | Wife | — | Maryland |
| 54 | Lanona A. Hahn | 15 | Daughter | — | Maryland |
| 55 | Verona J. Hahn | 10 | Daughter | — | Maryland |
| 56 | Wanda L. Hahn | 6 | Daughter | — | Maryland |
| 57 | Yvonne M. Hahn | 4 | Daughter | — | Maryland |
| 58 | Warren W. Bush | 60 | Head | General Work | Maryland |
| 59 | Laura M. Bush | 56 | Wife | — | Maryland |
| 60 | Clara V. Miner | 84 | Mother | — | Maryland |
| 61 | Raymon S. Reeder | 30 | Head | Tester | Pennsylvania |
| 62 | Almeda Reeder | 24 | Wife | — | Maryland |
| 63 | Charles W. Fager | 50 | Head | Assembling | Pennsylvania |
| 64 | Lesta M. Fager | 38 | Wife | — | Maryland |
| 65 | Charles Jr. Fager | 19 | Son | Operator Grinding Machine | Maryland |
| 66 | Betty J. Fager | 18 | Daughter | — | Maryland |
| 67 | John L. Fager | 17 | Son | — | Maryland |
| 68 | Charles W. Grable | 43 | Head | — | Maryland |
| 69 | Nellie E. Grable | 43 | Wife | — | Maryland |
| 70 | Robert C. Hahn | 25 | Step-son | Truck Driver | Maryland |
| 71 | John M. Slick | 28 | Head | Farmer | Maryland |
| 72 | Mary R. Slick | 21 | Wife | — | Maryland |
| 73 | Raymond C. Slick | 4 | Son | — | Maryland |
| 74 | William P. Cartwright | 31 | Head | General Work | Pennsylvania |
| 75 | Mary E. Cartwright | 22 | Wife | — | Pennsylvania |
| 76 | William G. Cartwright | 6 | Son | — | Pennsylvania |
| 77 | Joann M. Cartwright | 4 | Daughter | — | Pennsylvania |
| 78 | William Hahn | 74 | Head | — | Maryland |
| 79 | Guy C. Lewis | 43 | Head | Farmer | Maryland |
| 80 | Mary J. Lewis | 38 | Wife | — | Maryland |
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)