MC
Mary Conroy — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Essex, New Jersey
Our Model Tree links this Mary Conroy across the 1930 and 1940 US Censuses in Essex, New Jersey (XGBoost, ~Confirmed) — first a daughter (b.~1899), then head of a 9-person household.
Age 31
b. ~1899
Female
Daughter
Born: New Jersey
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Essex, New Jersey |
| Surname | Conroy |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Additional Details | |
| Occupation | Clerk |
| Industry | Telephone |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Clerk |
| Township / Ward | Verona Borough Part |
| Est. Birth Year | ~1899 |
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.
9 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Helen Conroy | Daughter | — | 27 | ~1903 |
| Margaret Conroy | Other | — | 56 | ~1874 |
| Margaret Conroy | Daughter | — | 33 | ~1897 |
| Mary Conroy | Daughter | — | 31 | ~1899 |
| Mary Bittner | Daughter | — | 74 | ~1856 |
| John Conroy | Head | — | 58 | ~1872 |
| Mary Mcnulty | Other | — | 54 | ~1876 |
| Alice Conroy | Daughter | — | 24 | ~1906 |
| Alice Mcnulty | Other | — | 49 | ~1881 |
Census Appearances
1930
Essex, New …
Daughter, age 31
Essex, New Jersey · implied b. ~1899 — 9 household members
| Surname | Conroy |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Occupation | Clerk |
| Industry | Telephone |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Essex-County, New …
Head, age 42
Essex-County, New Jersey · implied b. ~1898 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Conroy |
| Given Name | Marjorie |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Verona Borough |
| 1935 Residence (County) | Essex |
| Occupation | Teacher |
| Industry | School |
| Class of Worker | PW |
| Hours Worked | 28 |
| Income (1939) | 1850 |
| Highest Grade | C 5 |
| 1935 Residence | Same House |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
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 Conroy across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Conroy
Daughter · 1930 · age 31 · b. ~1899 · New Jersey
★ You are viewing this record
Sibling
Mary Bittner
Sibling · 1930 · age 74
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Conroy
Sibling · 1930 · age 27
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Conroy
Sibling · 1930 · age 33
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Conroy
Sibling · 1930 · age 24
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
1930 US Federal Census — Essex, New Jersey
Open full size
1930 US Federal Census — Essex, New Jersey
Page Contents
50 people indexed on this census page (ia:1930:newjerseycensus00reel1344:0532)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Margaret Oldham | 29 | Wife-H | — | New York |
| 52 | Vincent Oldham | 5 | Son | — | New Jersey |
| 53 | Mary Oldham | 1 | Daughter | — | New Jersey |
| 54 | Edward M. Simson | 59 | Head | Foreman | New Jersey |
| 55 | Mary L. Simson | 58 | Wife-H | — | Irish Free State |
| 56 | Catherine Simson | 19 | Niece | — | New Jersey |
| 57 | Carl Anderson | 48 | Head | Carpenter | Sweden |
| 58 | Eva Anderson | 44 | Wife-H | — | Sweden |
| 59 | David Anderson | 18 | Son | — | New Jersey |
| 60 | Dagmar Anderson | 16 | Daughter | — | New Jersey |
| 61 | Bertha Jacobson | 60 | Boarder | Cook | Sweden |
| 62 | Albert Ulmarast | 37 | Head | Mechanician | New Jersey |
| 63 | Lillian Ulmarast | 38 | Wife-H | — | New York |
| 64 | Richard Ulmarast | 7 | Son | — | New Jersey |
| 65 | Philip Ulmarast | 3 | Son | — | New Jersey |
| 66 | Ann Ulmarast | 1 | Daughter | — | New Jersey |
| 67 | Adolph Anderson | 42 | Head | Chauffeur | Sweden |
| 68 | Esther Anderson | 45 | Wife-H | — | Sweden |
| 69 | Lloyd Anderson | 18 | Son | Clerk | New Jersey |
| 70 | Hilda Anderson | 15 | Daughter | — | New Jersey |
| 71 | Louis Engelson | 70 | Head | — | Germany |
| 72 | Margaret Engelson | 54 | Wife-H | — | New York |
| 73 | Adelina Cheney | 44 | Head | — | England |
| 74 | Alice G. Cheney | 26 | Daughter | Teacher | Pennsylvania |
| 75 | Jacob Sinsky | 37 | Head | Seamstress | Poland |
| 76 | Rose Sinsky | 16 | Daughter | Typist | New Jersey |
| 77 | Jacob Sinsky | 14 | Son | — | New Jersey |
| 78 | Bertha Sinsky | 13 | Daughter | — | New Jersey |
| 79 | Thomas Lyons | 37 | Head | Agent | New Jersey |
| 80 | Jewell Lyons | 33 | Wife-H | Clerk | New Jersey |
| 81 | Thomas Jr. Lyons | 10 | Son | — | New Jersey |
| 82 | Dinara Rita Lyons | 6 | Daughter | — | New Jersey |
| 83 | Daniel O'Brien | 55 | Head | — | Irish Free State |
| 84 | Adelaide O'Brien | 52 | Wife-H | — | New Jersey |
| 85 | Gertrude O'Brien | 26 | Daughter | Operator | New Jersey |
| 86 | George Wyers | 42 | Boarder | Delivery Boy | New Jersey |
| 87 | John J. H. Conroy | 58 | Head | Conductor | New Jersey |
| 88 | Margaret A. Conroy | 56 | Wife-H | — | New Jersey |
| 89 | Margaret Conroy | 33 | Daughter | Teacher | New Jersey |
| 90 | Mary Conroy THIS PERSON | 31 | Daughter | Clerk | New Jersey |
| 91 | Helen M. Conroy | 27 | Daughter | Clerk | New Jersey |
| 92 | Alice A. Conroy | 24 | Daughter | Clerk | New Jersey |
| 93 | Mary Bittner | 74 | Daughter | — | New Jersey |
| 94 | Mary M. Mcnulty | 54 | Sister-in-law | Supervisor | New Jersey |
| 95 | Alice J. Mcnulty | 49 | Sister-in-law | Clerk | New Jersey |
| 96 | Lloyd Mederick | 37 | Head | Journeyman | New Jersey |
| 97 | Etta Mederick | 31 | Wife-H | — | New Jersey |
| 98 | Louis Mederick | 9 | Son | — | New Jersey |
| 99 | Stephen Mederick | 7 | Son | — | New Jersey |
| 100 | William Bergin | 38 | Head | Journeyman | New Jersey |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)