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John Monahan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Kings-County, New York
Our Model Tree links this John Monahan across the 1920, 1930 and 1940 US Censuses in Kings-County, New York (XGBoost, ~Confirmed) — first a head (b.~1886), then head of a 4-person household.
Age 54
b. ~1886
Male
Head
Born: Ireland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Kings-County, New York |
| Surname | Monahan |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Boro of B'klyn |
| 1935 Residence (County) | Kings |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | longshoreman |
| Industry | n. y. docks |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 906 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Occupation | Longshoreman |
| Township / Ward | Boro Of Bklyn |
| Est. Birth Year | ~1886 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| William Monahan | Son | — | 21 | ~1919 |
| Nora Monahan | Spouse | — | 54 | ~1886 |
| Nora Monahan | Daughter | — | 18 | ~1922 |
| John Monahan | Head | — | 54 | ~1886 |
Census Appearances
1920
Kings, New …
Head, age 32
Kings, New York · implied b. ~1888 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Monahan |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Retired |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1930
Kings, New …
Head, age 44
Kings, New York · implied b. ~1886 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Monahan |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | Ireland |
| Naturalization Status | Alien |
| Year of Immigration | 1910 |
| Age at First Marriage | 33 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Longshore |
| Industry | Docks |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Home Value / Rent | 20 |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
Kings-County, New …
Head, age 54
Kings-County, New York · implied b. ~1886 — 4 household members
| Surname | Monahan |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Boro of B'klyn |
| 1935 Residence (County) | Kings |
| Naturalization Status | Naturalized |
| Occupation | longshoreman |
| Industry | n. y. docks |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 906 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
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 Monahan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Monahan
Head · 1940 · age 54 · b. ~1886 · New York
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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 — 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-t0627-02559-00686)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Isabelle Herbert | 35 | Wife | — | New Jersey |
| 2 | John Herbert | 15 | Son | — | New York |
| 3 | Isabelle Herbert | 10 | Daughter | — | New York |
| 4 | George Hill | 33 | Head | Elec. Welder | New York |
| 5 | Alice Hill | 31 | Wife | — | New York |
| 6 | Joan Hill | 10 | Daughter | — | New York |
| 7 | Ann Hill | 2 | Daughter | — | New York |
| 8 | Ann Clark | 70 | Head | — | New York |
| 9 | John Clark | 35 | Son | Shiplifter | New York |
| 10 | John Murphy | 60 | Head | Longshoreman | New York |
| 11 | Charles Hurst | 44 | Head | Riveter | New York |
| 12 | Edith Hurst | 40 | Wife | — | New York |
| 13 | Charles Jr Hurst | 15 | Son | — | New York |
| 14 | Harry Hurst | 13 | Son | — | New York |
| 15 | Edith Hurst | 10 | Daughter | — | New York |
| 16 | Pouch Ole Barud | 76 | Head | — | Norway |
| 17 | John Keller | 60 | Lodger | Store Keeper | New York |
| 18 | John Monahan THIS PERSON | 54 | Head | Longshoreman | Ireland |
| 19 | Nora Monahan | 54 | Wife | — | Ireland |
| 20 | William Monahan | 21 | Son | Longshoreman | New York |
| 21 | Nora Monahan | 18 | Daughter | News Worker | New York |
| 22 | Donald Young | 22 | Head | Longshoreman | New York |
| 23 | Olive Young | 22 | Wife | — | England |
| 24 | Donald Jr. Young | 2 | Son | — | New York |
| 25 | William Quain | 42 | Head | Longshoreman | New York |
| 26 | Therese Quain | 37 | Wife | — | New York |
| 27 | John Quain | 13 | Son | — | New York |
| 28 | Therese Quain | 12 | Daughter | — | New York |
| 29 | Micheal Quain | 7 | Son | — | New York |
| 30 | Marilyn Quain | 3 | Daughter | — | New York |
| 31 | Stephen Quain | 0 | Son | — | New York |
| 32 | William Mccabe | 29 | Head | Longshoreman | New York |
| 33 | Felix Mccabe | 64 | Father | — | New York |
| 34 | Eleanor Mccabe | 20 | Sister | News Worker | New York |
| 35 | Cornelius Keeler | 40 | Head | Cooper | New York |
| 36 | Sophie Keeler | 39 | Wife | — | New York |
| 37 | William Keeler | 19 | Son | Runner | New York |
| 38 | Eleanor Keeler | 17 | Daughter | — | New York |
| 39 | Dorothy Keeler | 14 | Daughter | — | New York |
| 40 | Cornelius Keeler | 11 | Son | — | New York |
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)