JG
John Griffin — 1940 US Census Record
Model Tree available1940 United States Federal Census · Kings-County, New York
Our Model Tree links this John Griffin across the 1910, 1920, 1930 and 1940 US Censuses in Kings-County, New York (XGBoost, ~Confirmed), with identified parents Mary & Peter — first a head (b.~1904), then head of a 5-person household.
Age 36
b. ~1904
Male
Head
Born: New York
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Kings-County, New York |
| Surname | Griffin |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | New York |
| 1935 Residence (City) | New York City (Brooklyn) |
| 1935 Residence (County) | Kings |
| Additional Details | |
| Occupation | Policeman |
| Industry | City N.Y. |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 3000 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Occupation | Policeman |
| Township / Ward | New York City Brooklyn |
| Est. Birth Year | ~1904 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Maureen Griffin | Daughter | — | 1 | ~1939 |
| John Griffin | Head | — | 36 | ~1904 |
| John Griffin | Son | — | 5 | ~1935 |
| Donald Griffin | Son | — | 3 | ~1937 |
| Mary Griffin | Spouse | — | 36 | ~1904 |
Census Appearances
1910
Kings, New …
Son, age 4
Kings, New York · implied b. ~1906 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Griffin |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | none |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1920
Kings, New …
Son, age 14
Kings, New York · implied b. ~1906 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Griffin |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1930
Kings, New …
Son, age 26
Kings, New York · implied b. ~1904 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Griffin |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | New York |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Policeman |
| Industry | New York City |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
Kings-County, New …
Head, age 36
Kings-County, New York · implied b. ~1904 — 5 household members
| Surname | Griffin |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | New York |
| 1935 Residence (City) | New York City (Brooklyn) |
| 1935 Residence (County) | Kings |
| Occupation | Policeman |
| Industry | City N.Y. |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 3000 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
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 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Mary Griffin (~0.92 confidence) and father Peter Griffin (~0.92 confidence) and father Peter Griffin (~0.92 confidence) and mother Nellie Griffin (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Mary Griffin
b. ~1872
Source mother
● Household
· direct · ~0.92
Father
Peter Griffin
b. ~1875
Source father
● Household
· direct · ~0.92
Father
Peter Griffin
b. ~1878
Source father
● Household
· direct · ~0.92
Mother
Nellie Griffin
b. ~1880
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Griffin
Head · 1940 · age 36 · b. ~1904 · New York
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Kings-County, New York
Open full size
1940 US Federal Census — Kings-County, New York
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02611-00060)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | George Thos. Beyer | 17 | Son | Student | New York |
| 42 | Mary Griffin | 66 | Head | Housewife | Eire |
| 43 | John Finnegan | 29 | Nephew | Taxi Driver | New York |
| 44 | Jacob Knoth | 50 | Head | Machinist | Germany |
| 45 | Anna Knoth | 49 | Wife | Housewife | Germany |
| 46 | Eleanor Knoth | 22 | Daughter | Circulating Dept | Germany |
| 47 | Maude R. Lennon | 54 | Head | Stenographer | New York |
| 48 | Anna Mae Lennon | 79 | Mother | Housewife | New York |
| 49 | John Griffin THIS PERSON | 36 | Head | Policeman | New York |
| 50 | Mary Griffin | 36 | Wife | Housewife | England |
| 51 | John Griffin | 5 | Son | Student | New York |
| 52 | Donald Griffin | 3 | Son | — | New York |
| 53 | Maureen Griffin | 1 | Daughter | — | New York |
| 54 | Lucinda Padin | 43 | Head | Housewife | Spain |
| 55 | Isabella Padin | 21 | Daughter | Accountant | New York |
| 56 | Louis Padin | 18 | Son | Call Boy | New York |
| 57 | Frank Gonzales | 42 | Lodger | Cook | Spain |
| 58 | Ismael Sosa | 41 | Lodger | Laborer | Spain |
| 59 | Miguela Martinez | 40 | Lodger | Dressmaker | Spain |
| 60 | Pauline Golub | 45 | Head | Housewife | Russia |
| 61 | Seymour Golub | 15 | Son | Accounting Clerk | New York |
| 62 | Harriet Hill | 25 | Lodger | Salesman | Mass. |
| 63 | Henry J. F. Work | 63 | Head | Semi Retired | New York |
| 64 | Eva Work | 63 | Wife | Housewife | New York |
| 65 | Helen Work | 40 | Daughter | Chief Clerk | New York |
| 66 | Helen Wanamaker | 65 | Sister | Retired | New York |
| 67 | Emma Davis | 72 | Head | Housewife | England |
| 68 | Sadie Davis | 50 | Daughter | Housewife | England |
| 69 | James Davis | 42 | Son | Laborer | England |
| 70 | Charles Davis | 13 | Grandson | Student | New York |
| 71 | Charles Meyers | 51 | Head | Sand Hog | New Jersey |
| 72 | Elizabeth Meyers | 46 | Wife | Housewife | New York |
| 73 | Armin Buehler | 58 | Head | Sheet Metal Wkr | Hungary |
| 74 | Rose Buehler | 54 | Wife | Housewife | Hungary |
| 75 | Dorothy Buehler | 28 | Daughter | Stenographer | New York |
| 76 | Henrietta Buehler | 26 | Daughter | Buyer | New York |
| 77 | Edward Buehler | 24 | Son | Student | Conn. |
| 78 | Harry Buehler | 22 | Son | Teacher | Conn. |
| 79 | Arthur Buehler | 20 | Son | Student | Conn. |
| 80 | Fred L. Yling | 78 | Head | Clerk | Conn. |
Pedigree Summary
John
Gen 1 · 4 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)