MF
Mary Frederick — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Hudson-County, New Jersey
Our Model Tree links this Mary Frederick across the 1920, 1930 and 1940 US Censuses in Hudson-County, New Jersey (XGBoost, ~Confirmed) — first a spouse (b.~1881), then head of a 7-person household.
Age 59
b. ~1881
Female
Spouse
Born: Maine
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Hudson-County, New Jersey |
| Surname | Frederick |
| Given Name | Mary B |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 59 |
| Marital Status | Married |
| Birthplace | Maine |
| 1935 Residence (City) | Jersey City |
| 1935 Residence (County) | Hudson |
| Additional Details | |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
| Township / Ward | Jersey City |
| Est. Birth Year | ~1881 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Alice Frederick | Daughter | — | 23 | ~1917 |
| Patricia Frederick | Daughter | — | 22 | ~1918 |
| Margaret Maloney | Other | — | 70 | ~1870 |
| Elizabeth Frederick | Daughter | — | 32 | ~1908 |
| Anthony Frederick | Head | — | 67 | ~1873 |
| Mary Frederick | Spouse | — | 59 | ~1881 |
| Paul Frederick | Son | — | 15 | ~1925 |
Census Appearances
1920
Hudson, New …
Spouse, age 39
Hudson, New Jersey · implied b. ~1881 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Frederick |
| Given Name | Mary J |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Maine |
| Father's Birthplace | Maine |
| Mother's Birthplace | Maine |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
1930
Hudson, New …
Other, age 49
Hudson, New Jersey · implied b. ~1881 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Fredericks |
| Given Name | Mary |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Maine |
| Age at First Marriage | 26 |
| Father's Birthplace | Maine |
| Mother's Birthplace | Maine |
| Can Read/Write | Yes |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
1940
Hudson-County, New …
Spouse, age 59
Hudson-County, New Jersey · implied b. ~1881 — 7 household members
| Surname | Frederick |
| Given Name | Mary B |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 59 |
| Marital Status | Married |
| Birthplace | Maine |
| 1935 Residence (City) | Jersey City |
| 1935 Residence (County) | Hudson |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Maine |
| Birth Country | United States |
| Birthplace (normalized) | maine |
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 Frederick across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Frederick
Spouse · 1940 · age 59 · b. ~1881 · 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 — Hudson-County, New Jersey
Open full size
1940 US Federal Census — Hudson-County, New Jersey
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02407-00145)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Clara B Beugsch | 43 | Wife | School Teacher | New Jersey |
| 42 | Peter Beugsch | 19 | Son | Counter Man | New Jersey |
| 43 | Henri Beugsch | 16 | Son | — | New Jersey |
| 44 | John Beugsch | 14 | Son | — | New Jersey |
| 45 | Edward Beugsch | 12 | Son | — | New Jersey |
| 46 | Claire Beugsch | 10 | Daughter | — | New Jersey |
| 47 | Suzanne Beugsch | 8 | Daughter | — | New Jersey |
| 48 | Clara Zwick | 78 | Mother-in-law | — | New York |
| 49 | John J. B. O'Neill | 62 | Head | Secretary | New York |
| 50 | Anna J. O'Neill | 56 | Wife | — | New Jersey |
| 51 | Margaret G. Lane | 58 | Sister-in-law | — | New Jersey |
| 52 | Lucy J. Marlow | 73 | Head | Maid | Virginia |
| 53 | Anthony Frederick | 67 | Head | Bricklayer | New Jersey |
| 54 | Mary B Frederick THIS PERSON | 59 | Wife | — | Maine |
| 55 | Elizabeth Frederick | 32 | Daughter | Home Service Teacher | New Jersey |
| 56 | Alice Frederick | 23 | Daughter | Cashier | New Jersey |
| 57 | Patricia Frederick | 22 | Daughter | Private Nurse | New Jersey |
| 58 | Paul Frederick | 15 | Son | — | New Jersey |
| 59 | Margaret Maloney | 70 | Sister-in-law | — | Maine |
| 60 | Thomas Bailey | 61 | Head | Longshoreman | Georgia |
| 61 | Florine Bailey | 60 | Wife | — | Georgia |
| 62 | William C Rice | 24 | Son-in-law | Building Superintendent | South Carolina |
| 63 | Florine Bertha Rice | 24 | Daughter | — | Virginia |
| 64 | Edwina Rice | 2 | Granddaughter | — | New Jersey |
| 65 | Alfred C. Rice | 0 | Grandson | — | New Jersey |
| 66 | Ella | 58 | Boarder | — | South Carolina |
| 67 | Helen Ucheer | Usher | 31 | Head | Presser | Virginia |
| 68 | Blanche Ucheer | Usher | 13 | Daughter | — | Virginia |
| 69 | William Frazier | 41 | Lodger | Laborer Helper | Alabama |
| 70 | Lillian Geter | 50 | Head | Leaf Selector | South Carolina |
| 71 | Thomas Geter | 5 | Son | — | New Jersey |
| 72 | Melvin Jones | 20 | Daughter | Nursemaid | South Carolina |
| 73 | Floyd Cheatham | 47 | Head | Truck Driver | Virginia |
| 74 | Irene Cheatham | 42 | Wife | Maid | New York |
| 75 | Edna Murphy | 25 | Step-daughter | Laundress | New Jersey |
| 76 | Irene Foster | 20 | Step-daughter | Packer | New Jersey |
| 77 | Wilson Yancey | 57 | Head | Shakeout Man | West Virginia |
| 78 | Connie Yancey | 44 | Wife | Maid | Virginia |
| 79 | Charles Yancey | 22 | Son | Laborer | Pennsylvania |
| 80 | Edgar Carter | 17 | Nephew | — | Pennsylvania |
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)