MN
Mary Nichols — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Philadelphia-County, Pennsylvania
Our Model Tree links this Mary Nichols across the 1920, 1930 and 1940 US Censuses in Philadelphia-County, Pennsylvania (XGBoost, ~Confirmed) — first a spouse (b.~1887), then head of a 5-person household.
Age 53
b. ~1887
Female
Spouse
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Philadelphia-County, Pennsylvania |
| Surname | Nichols |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 53 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | PHILADELPHIA |
| 1935 Residence (County) | PHILADELPHIA |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Philadelphia |
| 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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Gloria Nichols | Daughter | — | 9 | ~1931 |
| Catherine Nichols | Daughter | — | 21 | ~1919 |
| Harry Nichols | Head | — | 52 | ~1888 |
| Floyd Nichols | Son | — | 16 | ~1924 |
| Mary Nichols | Spouse | — | 53 | ~1887 |
Census Appearances
1920
Philadelphia, Pennsylvania
Spouse, age 38
Philadelphia, Pennsylvania · implied b. ~1882 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nichols |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Philadelphia, Pennsylvania
Other, age 43
Philadelphia, Pennsylvania · implied b. ~1887 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nichols |
| Given Name | Mary |
| Relationship to Head | Roomer |
| Sex | F |
| Color / Race | Black |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Maryland |
| Age at First Marriage | 19 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Laundress |
| Industry | At Home |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Philadelphia-County, Pennsylvania
Spouse, age 53
Philadelphia-County, Pennsylvania · implied b. ~1887 — 5 household members
| Surname | Nichols |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | Black |
| Age | 53 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | PHILADELPHIA |
| 1935 Residence (County) | PHILADELPHIA |
| Class of Worker | 0 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
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 Nichols 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 Nichols
Spouse · 1940 · age 53 · b. ~1887 · Pennsylvania
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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 — Philadelphia-County, Pennsylvania
Open full size
1940 US Federal Census — Philadelphia-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03712-00008)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Perry S. Ward | 60 | Head | Track Walker | N. Ireland |
| 2 | Thomas Ward | 20 | Son | Salesman | Phila |
| 3 | John Newpool | 21 | Head | Cook | Phila |
| 4 | Joseph Ward | 28 | Head | Bottom Man | Phila |
| 5 | Margaret Ward | 23 | Wife | — | France |
| 6 | Clarence Q. Vry | 62 | Head | Salesman | Penna |
| 7 | Howard Q. Roby | 66 | Head | Machine Mechanic | Phila |
| 8 | Elizabeth Roby | 20 | Wife | — | Phila |
| 9 | Rose Roby | 2 | Daughter | — | Phila |
| 10 | William Roby | 0 | Son | — | Phila |
| 11 | Frederick T. Wilkinson | 33 | Partner | Loc. Fireman | Phila |
| 12 | Jean Pernes | 30 | Partner | Waitress | New Jersey |
| 13 | Milo Moss | 44 | Head | Fender Bender | Penna |
| 14 | Stewart Moss | 22 | Brother | Auto Mechanic | Penna |
| 15 | Martin Malone | 33 | Head | New Worker | Phila |
| 16 | Robert Bishop | 35 | Head | Orderly | Scotland |
| 17 | Mildred Bishop | 36 | Wife | — | Pittsburg |
| 18 | Peter Weber | 68 | Head | Laundry Man | Phila |
| 19 | Annie Weber | 58 | Wife | — | Phila |
| 20 | Anna Weber | 25 | Daughter | New Worker | Phila |
| 21 | Harry Nichols | 52 | Head | Laborer | Maryland |
| 22 | Mary Nichols THIS PERSON | 53 | Wife | — | Maryland |
| 23 | Catherine Nichols | 21 | Daughter | — | Delaware |
| 24 | Floyd Nichols | 16 | Son | — | Phila |
| 25 | Gloria Nichols | 9 | Daughter | — | Phila |
| 26 | Blanche Grayson | 66 | Head | — | Maryland |
| 27 | John Jackson | 66 | Head | — | Virginia |
| 28 | Mary Jackson | 65 | Wife | Housework | Virginia |
| 29 | Pauline Jackson | 17 | Daughter | — | Phila |
| 30 | Albert Pormagnus | 27 | Head | — | New Orleans |
| 31 | Emlyn Pormagnus | 26 | Wife | — | Florida |
| 32 | Marcia Pormagnus | 6 | Daughter | — | Phila |
| 33 | Cynthia Pormagnus | 3 | Daughter | — | Phila |
| 34 | Gloria Pormagnus | 2 | Daughter | — | Phila |
| 35 | Amanda Harris | 43 | Head | — | S. Carolina |
| 36 | Beatrice Harris | 20 | Daughter | Housework | S. Carolina |
| 37 | Constance Harris | 6 | Daughter | — | Phila |
| 38 | Roberta Thomas | 6 | Lodger | — | Phila |
| 39 | Thedo Atkins | 40 | Lodger | Relief | Virginia |
| 40 | — | None | — | — | — |
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)