JH
John Hennessey — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Washington, Maryland
Our Model Tree links this John Hennessey across the 1930 and 1940 US Censuses in Washington, Maryland (XGBoost, ~Confirmed) — first a head (b.~1890), then head of a 8-person household.
Age 40
b. ~1890
Male
Head
Born: Maryland
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Washington, Maryland |
| Surname | Hennessey |
| Given Name | John L. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Maryland |
| Age at First Marriage | 19 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Additional Details | |
| Occupation | Farmer |
| Industry | General Farming |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 3500 |
| Radio Set | R |
| Veteran | No |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Farmer |
| Township / Ward | Election District 22 |
| Est. Birth Year | ~1890 |
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.
8 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Raymond Hennessey | Son | — | 20 | ~1910 |
| John Hennessey | Head | — | 40 | ~1890 |
| Russell Hennessey | Son | — | 11 | ~1919 |
| Lloyd Lantz | Other | — | 22 | ~1908 |
| Leonard Hennessey | Son | — | 18 | ~1912 |
| Theodore Hennessey | Daughter | — | 8 | ~1922 |
| Irene Hennessey | Daughter | — | 13 | ~1917 |
| Daisy Hennessey | Spouse | — | 36 | ~1894 |
Census Appearances
1930
Washington, Maryland
Head, age 40
Washington, Maryland · implied b. ~1890 — 8 household members
| Surname | Hennessey |
| Given Name | John L. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Maryland |
| Age at First Marriage | 19 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Farmer |
| Industry | General Farming |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 3500 |
| Radio Set | R |
| Veteran | No |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Washington-County, Maryland
Head, age 50
Washington-County, Maryland · implied b. ~1890 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Henesy |
| Given Name | John L. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Wash |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 70 |
| Income (1939) | 0 |
| Highest Grade | No 5 |
| 1935 Residence | Md |
| 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 Hennessey across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Hennessey
Head · 1930 · age 40 · b. ~1890 · Maryland
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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 — Washington, Maryland
Open full size
1930 US Federal Census — Washington, Maryland
Page Contents
50 people indexed on this census page (ia:1930:15thcensus881unit:0793)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Eugene Morrison | 5 | Son | — | Maryland |
| 2 | Charles Morrison | 3 | Son | — | Maryland |
| 3 | Leon Morrison | 2 | Son | — | Maryland |
| 4 | Joseph Forcino | 52 | Head | Farmer | Italy |
| 5 | Elina Forcino | 51 | Wife | — | Italy |
| 6 | Perry Forcino | 26 | Son | Laborer | Italy |
| 7 | Mary Forcino | 23 | Daughter | — | Pennsylvania |
| 8 | William Forcino | 21 | Son | Machinist | Pennsylvania |
| 9 | Mildred Forcino | 18 | Son | Laborer | Pennsylvania |
| 10 | James Forcino | 15 | Son | — | Maryland |
| 11 | Frank Forcino | 11 | Son | — | Maryland |
| 12 | Mary Forcino | 81 | Mother | — | Italy |
| 13 | Clara Theodore | 17 | Daughter in law | — | Maryland |
| 14 | William Dinges | 62 | Head | Farmer | Maryland |
| 15 | Laura Dinges | 49 | Wife | — | Maryland |
| 16 | Emma Dinges | 23 | Daughter | Teacher | Maryland |
| 17 | Edgar Dinges | 16 | Son | — | Maryland |
| 18 | Harry Wolfinger | 57 | Head | Farmer | Maryland |
| 19 | Edward Wolfinger | 24 | Son | Salesman | Maryland |
| 20 | Catherine Bakers | 63 | Servant | Servant | Maryland |
| 21 | Mabel Earnshaw | 16 | Servant | Servant | Maryland |
| 22 | Lloyd Davis | 30 | Head | Laborer | Maryland |
| 23 | Carrie Davis | 30 | Wife | — | Maryland |
| 24 | Wanetta Davis | 10 | Daughter | — | Maryland |
| 25 | Dorothy Davis | 9 | Daughter | — | Maryland |
| 26 | Lloyd Davis | 8 | Son | — | Maryland |
| 27 | Rosalyn Davis | 6 | Daughter | — | Maryland |
| 28 | Robert Davis | 4 | Son | — | Maryland |
| 29 | Sarah Davis | 1 | Daughter | — | Maryland |
| 30 | Hubert Davis | 0 | Son | — | Maryland |
| 31 | John L. Hennessey THIS PERSON | 40 | Head | Farmer | Maryland |
| 32 | Daisy Hennessey | 36 | Wife | — | Virginia |
| 33 | Raymond Hennessey | 20 | Son | Farmer | Maryland |
| 34 | Leonard Hennessey | 18 | Son | — | Maryland |
| 35 | Irene Hennessey | 13 | Daughter | — | Maryland |
| 36 | Russell Hennessey | 11 | Son | — | Maryland |
| 37 | Theodore Hennessey | 8 | Daughter | — | Maryland |
| 38 | Lloyd Lantz | 22 | Lodger | Laborer | Maryland |
| 39 | Charles Spidle | 44 | Head | Farmer | Maryland |
| 40 | Susie Spidle | 37 | Wife | — | Maryland |
| 41 | Virginia Spidle | 16 | Daughter | — | Maryland |
| 42 | Ira Spidle | 11 | Daughter | — | Maryland |
| 43 | Franklin Spidle | 10 | Son | — | Maryland |
| 44 | Marvin Spidle | 8 | Son | — | Maryland |
| 45 | Jennie Spidle | 71 | Mother | — | Maryland |
| 46 | William Miller | 59 | Lodger | Laborer | Maryland |
| 47 | Eric Dehart | 39 | Head | Farmer | Virginia |
| 48 | Credie Dehart | 40 | Wife | — | Virginia |
| 49 | Harmon Dehart | 16 | Son | — | Virginia |
| 50 | Ruby Dehart | 15 | Daughter | — | Virginia |
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)