JG
John Griffin — 1940 US Census Record
Model Tree available1940 United States Federal Census · Baltimore-County, Maryland
Our Model Tree links this John Griffin across the 1920, 1930 and 1940 US Censuses in Baltimore-County, Maryland (XGBoost, ~Confirmed), with identified parents James & Marie — first a son (b.~1925), then head of a 6-person household.
Age 15
b. ~1925
Male
Son
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-County, Maryland |
| Surname | Griffin |
| Given Name | John J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore |
| Additional Details | |
| Highest Grade | H-1 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Election District 14 |
| Est. Birth Year | ~1925 |
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 |
|---|---|---|---|---|
| Mary Griffin | Daughter | — | 8 | ~1932 |
| Dorothy Griffin | Daughter | — | 19 | ~1921 |
| James Griffin | Head | — | 41 | ~1899 |
| John Griffin | Son | — | 15 | ~1925 |
| James Griffin | Son | — | 18 | ~1922 |
| Marie Griffin | Spouse | — | 36 | ~1904 |
Census Appearances
1920
None, Maryland
Other, age
None, Maryland · implied b. ~1920 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Griffin |
| Given Name | John Edward |
| Relationship to Head | Grandson |
| Sex | M |
| Color / Race | Black |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Baltimore, Maryland
Other, age 10
Baltimore, Maryland · implied b. ~1920 — 50 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Griffin |
| Given Name | John |
| Relationship to Head | Inmate |
| Sex | M |
| Color / Race | Black |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-County, Maryland
Son, age 15
Baltimore-County, Maryland · implied b. ~1925 — 6 household members
| Surname | Griffin |
| Given Name | John J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore |
| Highest Grade | H-1 |
| 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 Griffin across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage. Identified parents: father James Griffin (~0.92 confidence) and mother Marie Griffin (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Griffin
b. ~1899
Source father
● Household
· direct · ~0.92
Mother
Marie Griffin
b. ~1904
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Griffin
Son · 1940 · age 15 · b. ~1925 · Maryland
★ You are viewing this record
Sibling
James Griffin
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Griffin
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Griffin
Sibling · 1940 · age 19
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 — Baltimore-County, Maryland
Open full size
1940 US Federal Census — Baltimore-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01506-00919)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Frank-Regina Frank | 6 | daughter | — | Maryland |
| 2 | Fridrick A. Schreun | 51 | Head | Traffic Clerk | Maryland |
| 3 | Margaret S. Schreun | 29 | Wife | — | Maryland |
| 4 | Fredrick R. Schreun | 4 | Son | — | Maryland |
| 5 | Robert Leigh Schreun | 2 | Son | — | Maryland |
| 6 | William J. Lippert | 28 | Head | Salesman | Pennsylvania |
| 7 | Helen L. Lippert | 25 | Wife | — | Maryland |
| 8 | Carol Ann Lippert | 3 | daughter | — | Maryland |
| 9 | Charles E. Johnson | 34 | Head | Operator | Maryland |
| 10 | Mary A. Johnson | 31 | Wife | — | Maryland |
| 11 | Alice Coleman | 67 | Mother | — | Maryland |
| 12 | Charles E. Johnson | 11 | Son | — | Maryland |
| 13 | Doris L. Johnson | 8 | daughter | — | Maryland |
| 14 | William C. Johnson | 2 | Son | — | Maryland |
| 15 | Robert E. Johnson | 1 | Son | — | Maryland |
| 16 | Henry Leutsker | 42 | Head | Mechanic | Maryland |
| 17 | Anna C. Leutsker | 42 | Wife | — | Germany |
| 18 | Lillian E. Leutsker | 21 | daughter | Secretary | Maryland |
| 19 | Vernon J. Leutsker | 10 | Son | — | Maryland |
| 20 | Melvin G. Leutsker | 10 | Son | — | Maryland |
| 21 | James R. Griffin | 41 | Head | Engineer | Maryland |
| 22 | Marie A. Griffin | 36 | Wife | — | Maryland |
| 23 | Dorothy H. Griffin | 19 | daughter | — | Maryland |
| 24 | Mary E. Griffin | 8 | daughter | — | Maryland |
| 25 | James J. Griffin | 18 | Son | — | Maryland |
| 26 | John J. Griffin THIS PERSON | 15 | Son | — | Maryland |
| 27 | Raymond C. Ford | 35 | Head | Clerk | Maryland |
| 28 | Ruth A. Ford | 34 | Wife | — | Maryland |
| 29 | Betty R. Ford | 11 | daughter | — | Maryland |
| 30 | Florence Brauer | 56 | Mother in law | — | Maryland |
| 31 | William D. Pohlmeyer | 62 | Head | Engineer | Maryland |
| 32 | Anna A. Pohlmeyer | 53 | Wife | — | Maryland |
| 33 | Charles W. Schisler | 20 | Nephew | Packer | Maryland |
| 34 | Francis G. Buchheister | 35 | Head | Chauffeur | Maryland |
| 35 | Anna Buchheister | 33 | Wife | — | Maryland |
| 36 | George C. Knobel | 69 | Father in law | Cleaning Service | Maryland |
| 37 | Catherine S. Knobel | 60 | Mother in law | — | Maryland |
| 38 | Robert G. Buchheister | 18 | Son | — | Maryland |
| 39 | Theresa A. Buchheister | 5 | daughter | — | Maryland |
| 40 | Charles A. Mayer | 47 | Head | Machinist | Pennsylvania |
Pedigree Summary
John + 3 siblings
Gen 1 · 2 parents
~0.92
Max depth 4 (1900–1950 window)
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)