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William Lynch — 1940 US Census Record
Model Tree available1940 United States Federal Census · Passaic-County, New Jersey
Our Model Tree links this William Lynch across the 1920, 1930 and 1940 US Censuses in Passaic-County, New Jersey (XGBoost, ~Confirmed), with identified parents Thomas & Mary — first a son (b.~1893), then head of a 3-person household.
Age 47
b. ~1893
Male
Son
Born: Connecticut
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Passaic-County, New Jersey |
| Surname | Lynch |
| Given Name | William F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Single |
| Birthplace | Connecticut |
| 1935 Residence (City) | Passaic City |
| 1935 Residence (County) | Passaic |
| Additional Details | |
| Occupation | Asst. Chemist |
| Industry | Rubber Mfg. Co. |
| Class of Worker | PW |
| Income (1939) | 2400 |
| Highest Grade | H 8 |
| 1935 Residence | Same Place |
| Birth State | Connecticut |
| Birth Country | United States |
| Birthplace (normalized) | connecticut |
| Occupation | Asst. Chemist |
| Township / Ward | Passaic City |
| Est. Birth Year | ~1893 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Mary Lynch | Daughter | — | 46 | ~1894 |
| Thomas Lynch | Head | — | 79 | ~1861 |
| William Lynch | Son | — | 47 | ~1893 |
Census Appearances
1920
Passaic, New …
Son, age 27
Passaic, New Jersey · implied b. ~1893 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lynch |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Connecticut |
| Father's Birthplace | Connecticut |
| Mother's Birthplace | Connecticut |
| Occupation | Clerk |
| Industry | Rubber Mfg |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Connecticut |
| Birth Country | United States |
| Birthplace (normalized) | connecticut |
1930
Passaic, New …
Son, age 37
Passaic, New Jersey · implied b. ~1893 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lynch |
| Given Name | William F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Single |
| Birthplace | Connecticut |
| Father's Birthplace | Connecticut |
| Mother's Birthplace | Connecticut |
| Occupation | Stenographer |
| Industry | Rubber Goods |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Connecticut |
| Birth Country | United States |
| Birthplace (normalized) | connecticut |
1940
Passaic-County, New …
Son, age 47
Passaic-County, New Jersey · implied b. ~1893 — 3 household members
| Surname | Lynch |
| Given Name | William F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Single |
| Birthplace | Connecticut |
| 1935 Residence (City) | Passaic City |
| 1935 Residence (County) | Passaic |
| Occupation | Asst. Chemist |
| Industry | Rubber Mfg. Co. |
| Class of Worker | PW |
| Income (1939) | 2400 |
| Highest Grade | H 8 |
| 1935 Residence | Same Place |
| Birth State | Connecticut |
| Birth Country | United States |
| Birthplace (normalized) | connecticut |
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 William Lynch across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Thomas Lynch (~0.92 confidence) and mother Mary Lynch (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Thomas Lynch
b. ~1862
Source father
● Household
· direct · ~0.92
Mother
Mary Lynch
b. ~1864
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Lynch
Son · 1940 · age 47 · b. ~1893 · New Jersey
★ You are viewing this record
Sibling
Mary Lynch
Sibling · 1940 · age 46
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 — Passaic-County, New Jersey
Open full size
1940 US Federal Census — Passaic-County, New Jersey
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02378-00634)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Archie Hanna | 72 | Wife | — | Maine |
| 2 | Isabel B. Montgomery | 55 | Head | — | New Jersey |
| 3 | William Mathey | 47 | Head | Proprietor | New Jersey |
| 4 | Margaret R. Mathey | 44 | Wife | — | New Jersey |
| 5 | Lawrence Mathey | 79 | Father | — | New Jersey |
| 6 | Vincent Mathey | 40 | Brother | Proprietor | New Jersey |
| 7 | Emma B. Lake | 53 | Head | — | New Jersey |
| 8 | William Garrabrant | 41 | Son in law | Foreman | New Jersey |
| 9 | Elsie Garrabrant | 44 | Daughter | — | New Jersey |
| 10 | May Urban | 16 | Grandchild | Beautician | New Jersey |
| 11 | William Cotany | 41 | Head | Proprietor | Germany |
| 12 | Margaret Cotany | 41 | Wife | Cook | Germany |
| 13 | Thomas J. Lynch | 79 | Head | — | Connecticut |
| 14 | William F. Lynch THIS PERSON | 47 | Son | Asst. Chemist | Connecticut |
| 15 | Mary M. Lynch | 46 | Daughter | Secy | Connecticut |
| 16 | James Reagan | 69 | Head | Checker | New Jersey |
| 17 | Sadie B. Reagan | 62 | Wife | — | New York |
| 18 | John W. Reagan | 22 | Son | Corporate Secy | New Jersey |
| 19 | John Sullivan | 21 | Lodger | Clerk | New Jersey |
| 20 | Thomas Pascal | 70 | Head | Foreman | Wales |
| 21 | Elizabeth Pascal | 63 | Wife | — | Wales |
| 22 | Thomas Pascal | 18 | Grandson | Floor Worker | New Jersey |
| 23 | Catherine Frain | 55 | Sister in law | Seamer | Ireland |
| 24 | Frank Chonko | 48 | Head | Finisher | Hungary |
| 25 | Caroline Chonko | 45 | Wife | — | Hungary |
| 26 | Margaret Chonko | 22 | Daughter | Mender | New Jersey |
| 27 | Boleslaw Krajewski | 44 | Head | Musician | Poland |
| 28 | Caroline Krajewski | 44 | Wife | — | New Jersey |
| 29 | Harriet Krajewski | 20 | Daughter | — | New Jersey |
| 30 | Mary Ann Krajewski | 18 | Daughter | — | New Jersey |
| 31 | Bernice Krajewski | 11 | Daughter | — | New Jersey |
| 32 | Matthew North | 60 | Head | Inspector | Mass. |
| 33 | Mary North | 57 | Wife | — | Mass. |
| 34 | Joseph Pashko | 59 | Head | Taylor | Russia |
| 35 | Helen Pashko | 50 | Wife | Seamer | Russia |
| 36 | Alexander Pashko | 18 | Son | Floor Worker | New York |
| 37 | Joseph Pashko | 16 | Son | — | New York |
| 38 | Zen Minkowski | 40 | Lodger | Cutter | Russia |
| 39 | Simon Karhan | 31 | Head | Proprietor | New York |
| 40 | Lillian Karhan | 29 | Wife | — | Rh. Island |
Pedigree Summary
William + 1 sibling
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)