MC
Mary Connolly — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Essex-County, New Jersey
Our Model Tree links this Mary Connolly across the 1920, 1930 and 1940 US Censuses in Essex-County, New Jersey (XGBoost, ~Confirmed) — first a head (b.~1889), then head of a 3-person household.
Age 51
b. ~1889
Female
Head
Born: Ireland
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Essex-County, New Jersey |
| Surname | Connolly |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 51 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| 1935 Residence (City) | Newark |
| 1935 Residence (County) | Essex |
| Naturalization Status | Naturalized |
| Additional Details | |
| Hours Worked | 0 |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Township / Ward | Newark |
| Est. Birth Year | ~1889 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Connolly | Head | — | 51 | ~1889 |
| Ann Connolly | Daughter | — | 9 | ~1931 |
| Theresa Connolly | Daughter | — | 6 | ~1934 |
Census Appearances
1920
Hudson, New …
Other, age 32
Hudson, New Jersey · implied b. ~1888 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Connolly |
| Given Name | Margaret |
| Relationship to Head | Sister-in-law |
| Sex | F |
| Color / Race | White |
| Age | 32 |
| Marital Status | Single |
| Birthplace | Ireland |
| Year of Immigration | 1906 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Year of Naturalization | 1916 |
| Birthplace (normalized) | ireland |
1930
Passaic, New …
Other, age 42
Passaic, New Jersey · implied b. ~1888 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Connolly |
| Given Name | Margaret |
| Relationship to Head | Head-H |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1901 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | New York |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 40 |
| Radio Set | R |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
Essex-County, New …
Head, age 51
Essex-County, New Jersey · implied b. ~1889 — 3 household members
| Surname | Connolly |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 51 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| 1935 Residence (City) | Newark |
| 1935 Residence (County) | Essex |
| Naturalization Status | Naturalized |
| Hours Worked | 0 |
| Highest Grade | No 5 |
| 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 Mary Connolly across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Connolly
Head · 1940 · age 51 · b. ~1889 · New Jersey
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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 — Essex-County, New Jersey
Open full size
1940 US Federal Census — Essex-County, New Jersey
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02424-00146)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Walter Grohe | 27 | Head | Chauffeur | New Jersey |
| 2 | Gladys Grohe | 23 | Wife | — | New Jersey |
| 3 | Bernice Grohe | 4 | Daughter | — | New Jersey |
| 4 | Walter Jr. Grohe | 2 | Son | — | New Jersey |
| 5 | Patrick Littworth | 55 | Head | Car Inspector | Ireland |
| 6 | Rose Littworth | 54 | Wife | — | Ireland |
| 7 | Norman Littworth | 21 | Son | Moulder | New Jersey |
| 8 | Theodore Littworth | 20 | Son | Clerk | New Jersey |
| 9 | Beatrice Littworth | 18 | Daughter | Clerk | New Jersey |
| 10 | Margaret Littworth | 16 | Daughter | Attendant-Gas Station | New Jersey |
| 11 | Norman Chinnery | 20 | Niece | Clerk | New Jersey |
| 12 | Louis Colo | 33 | Father | Laborer | New Jersey |
| 13 | Mary Colo | 33 | Wife | — | New Jersey |
| 14 | Salvatore Colo | 4 | Son | — | New Jersey |
| 15 | Anthony Colo | 3 | Son | — | New Jersey |
| 16 | Josephine Colo | 2 | Daughter | — | New Jersey |
| 17 | Marion Fallgraw | 68 | Head | Chauffeur | Italy |
| 18 | Phillip Fallgraw | 30 | Son | — | New Jersey |
| 19 | William Fallgraw | 21 | Nephew | Clerk | New Jersey |
| 20 | Joseph Fallgraw | 18 | Nephew | Checker | New Jersey |
| 21 | Valentine Fallgraw | 16 | Nephew | — | New Jersey |
| 22 | James Mulgrew | 57 | Head | Agent | Italy |
| 23 | Helen Mulgrew | 36 | Wife | — | New Jersey |
| 24 | Frances Mulgrew | 12 | Son | — | New Jersey |
| 25 | John Mcgrath | 58 | Head | Millwright | Ireland |
| 26 | Martha Mcgrath | 57 | Wife | — | Ireland |
| 27 | John Jr. Mcgrath | 26 | Son | Sales | New Jersey |
| 28 | Daniel Mcennery | 63 | Head | Bartender | England |
| 29 | Hanna Mcennery | 63 | Wife | — | Ireland |
| 30 | Joseph Mcennery | 26 | Son | Laborer | New Jersey |
| 31 | Marcus Brooks | 41 | Head | Agent-Ass'T | New Jersey |
| 32 | Helen Brooks | 28 | Wife | Saleslady | New Jersey |
| 33 | Josephine Brooks | 7 | Daughter | — | New Jersey |
| 34 | William Brooks | 13 | Son | — | New Jersey |
| 35 | Mary Connolly THIS PERSON | 51 | Head | — | Ireland |
| 36 | Ann Connolly | 9 | Daughter | — | New Jersey |
| 37 | Theresa Connolly | 6 | Daughter | — | New Jersey |
| 38 | Michael Clark | 47 | Head | Laborer | New Jersey |
| 39 | Bridget Clark | 48 | Wife | — | New Jersey |
| 40 | Margaret Clark | 15 | Daughter | Clerk | 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)