ML
Mary Larsen — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Essex-County, New Jersey
Our Model Tree links this Mary Larsen across the 1920, 1930 and 1940 US Censuses in Essex-County, New Jersey (XGBoost, ~Confirmed) — first a spouse (b.~1887), then head of a 4-person household.
Age 53
b. ~1887
Female
Spouse
Born: Scotland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Essex-County, New Jersey |
| Surname | Larsen |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 53 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | Newark |
| Naturalization Status | Naturalized |
| Additional Details | |
| Highest Grade | C 2 |
| 1935 Residence | New Jersey |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
| Township / Ward | Nutley Town |
| Est. Birth Year | ~1887 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Kathleen Larsen | Daughter | — | 21 | ~1919 |
| Mary Larsen | Spouse | — | 53 | ~1887 |
| Arthur Larsen | Son | — | 15 | ~1925 |
| Monica Larsen | Head | — | 52 | ~1888 |
Census Appearances
1920
Essex, New …
Other, age 33
Essex, New Jersey · implied b. ~1887 — 25 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Larsen |
| Given Name | Mary |
| Relationship to Head | Roomer |
| Sex | F |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Scotland |
| Year of Immigration | 1913 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Scotch |
| Birth Country | Scotland |
| Year of Naturalization | 1919 |
| Birthplace (normalized) | scotland |
1930
Essex, New …
Other, age 43
Essex, New Jersey · implied b. ~1887 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Larsen |
| Given Name | Mary |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Scotland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1913 |
| Age at First Marriage | 27 |
| Father's Birthplace | North Ireland |
| Mother's Birthplace | Scotland |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1940
Essex-County, New …
Spouse, age 53
Essex-County, New Jersey · implied b. ~1887 — 4 household members
| Surname | Larsen |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 53 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | Newark |
| Naturalization Status | Naturalized |
| Highest Grade | C 2 |
| 1935 Residence | New Jersey |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
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 Mary Larsen across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Larsen
Spouse · 1940 · age 53 · b. ~1887 · New Jersey
★ 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 — Essex-County, New Jersey
Open full size
1940 US Federal Census — Essex-County, New Jersey
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-02338-00681)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Gladys Lockwood | 21 | Daughter | Clerk | New Jersey |
| 2 | Marion Lockwood | 18 | Daughter | Salesgirl | New Jersey |
| 3 | Bill Melberger | 79 | Brother in law | — | New Jersey |
| 4 | Monica Larsen | 52 | Head | Manager | Denmark |
| 5 | Mary Larsen THIS PERSON | 53 | Wife | — | Scotland |
| 6 | Arthur Larsen | 15 | Son | Machine Shop | New Jersey |
| 7 | Kathleen Larsen | 21 | Daughter | Stenograph | New Jersey |
| 8 | William Rooney | 34 | Head | Salesman | Pennsylvania |
| 9 | Ruth Rooney | 34 | Wife | — | Pennsylvania |
| 10 | William Rooney | 15 | Son | — | Pennsylvania |
| 11 | Marion Schrick | 24 | Sister in law | Stenograph | Pennsylvania |
| 12 | John Chomber | 49 | Head | Office Manager | England |
| 13 | Edith Chomber | 49 | Wife | — | New Jersey |
| 14 | Joyce Mackovich | 24 | Maid | House Work | New Jersey |
| 15 | Louis D. Zacher | 36 | Head | Electrician | New Jersey |
| 16 | Marie Zacher | 32 | Wife | — | Scotland |
| 17 | Louis Jr. Zacher | 8 | Son | — | New Jersey |
| 18 | Joseph Rothri | 48 | Head | Salesman | New Jersey |
| 19 | Rose Rothri | 42 | Wife | — | New Jersey |
| 20 | Gloria Rothri | 18 | Daughter | Accounting | New Jersey |
| 21 | Leon Bailey | 42 | Head | Sales Engineer | Connecticut |
| 22 | Francis E. Bailey | 51 | Wife | — | New York |
| 23 | Johanna Dye | 70 | Head | — | New York |
| 24 | August Smith | 45 | Son | Salesman | New York |
| 25 | Lillian Dye | 40 | Daughter | Clerk | New York |
| 26 | Mabel Dye | 39 | Daughter | Clerk | New York |
| 27 | Theresa M. Kenny | 37 | Head | — | Pennsylvania |
| 28 | William Kenny | 36 | Husband | Salesman | Pennsylvania |
| 29 | Leo Kenny | 18 | Son | — | Pennsylvania |
| 30 | Paul Schuster | 71 | Brother | Waiter | Pennsylvania |
| 31 | Charles Sautter | 54 | Head | Salesman | New Jersey |
| 32 | Anna Sautter | 41 | Wife | — | New Jersey |
| 33 | Francis Schmitzer | 30 | Sister in law | Floor Lady | New Jersey |
| 34 | Rocco Laruzza | 37 | Head | Manager | New Jersey |
| 35 | Josephine Laruzza | 29 | Wife | — | New Jersey |
| 36 | Frank Wood | 76 | Head | Chemist | Illinois |
| 37 | Shirley Wood | 78 | Wife | — | Illinois |
| 38 | Russell Ryerson | 36 | Head | Section Manager | New Jersey |
| 39 | Helen Ryerson | 34 | Wife | — | New Jersey |
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)