DM
Dorothy Martin — 1940 US Census Record
Model Tree available1940 United States Federal Census · Delaware-County, Pennsylvania
Our Model Tree links this Dorothy Martin across the 1920, 1930 and 1940 US Censuses in Delaware-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Fred & Fred — first a daughter (b.~1919), then head of a 8-person household.
Age 21
b. ~1919
Female
Daughter
Born: New Jersey
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Delaware-County, Pennsylvania |
| Surname | Martin |
| Given Name | Dorothy |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Marple Twp. |
| 1935 Residence (County) | Delaware |
| Additional Details | |
| Occupation | Typist |
| Industry | Insurance Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1040 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Typist |
| Township / Ward | Marple Twp |
| Est. Birth Year | ~1919 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Dorothy | Age | Birth yr |
|---|---|---|---|---|
| Marilyn Martin | Daughter | — | 16 | ~1924 |
| Dorothy Martin | Daughter | — | 21 | ~1919 |
| Frederick Martin | Head | — | 44 | ~1896 |
| Blanche Chambers | Other | — | 54 | ~1886 |
| Frederick Chambers | Other | — | 27 | ~1913 |
| Helen Chambers | Other | — | 28 | ~1912 |
| Frederick Martin | Son | — | 4 | ~1936 |
| Helen Martin | Spouse | — | 42 | ~1898 |
Census Appearances
1920
Philadelphia, Pennsylvania
Daughter, age 1
Philadelphia, Pennsylvania · implied b. ~1919 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Dorothy H. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1930
Delaware, Pennsylvania
Daughter, age 11
Delaware, Pennsylvania · implied b. ~1919 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Dorothea H |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Delaware-County, Pennsylvania
Daughter, age 21
Delaware-County, Pennsylvania · implied b. ~1919 — 8 household members
| Surname | Martin |
| Given Name | Dorothy |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Marple Twp. |
| 1935 Residence (County) | Delaware |
| Occupation | Typist |
| Industry | Insurance Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1040 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| 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 Dorothy Martin across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage. Identified parents: father Fred Martin (~0.92 confidence) and father Fred Martin (~0.92 confidence) and father Frederick Martin (~0.92 confidence) and mother Helen Martin (~0.92 confidence) and mother Helen Martin (~0.92 confidence) and mother Helen Martin (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Fred Martin
b. ~1881
Source father
● Household
· direct · ~0.92
Father
Fred Martin
b. ~1896
Source father
● Household
· direct · ~0.92
Father
Frederick Martin
b. ~1896
Source father
● Household
· direct · ~0.92
Mother
Helen Martin
b. ~1897
Source mother
● Household
· direct · ~0.92
Mother
Helen Martin
b. ~1897
Source mother
● Household
· direct · ~0.92
Mother
Helen Martin
b. ~1898
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Dorothy Martin
Daughter · 1940 · age 21 · b. ~1919 · Pennsylvania
★ You are viewing this record
Sibling
Frederick Martin
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marilyn Martin
Sibling · 1940 · age 16
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
1940 US Federal Census — Delaware-County, Pennsylvania
Open full size
1940 US Federal Census — Delaware-County, Pennsylvania
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-03493-00557)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Nancy Dutton | 7 | daughter | — | Pennsylvania |
| 2 | Anthony Dutton | 5 | son | — | Pennsylvania |
| 3 | Stephen Dutton | 2 | son | — | Pennsylvania |
| 4 | Frederick Martin | 44 | Head | Controller | Pennsylvania |
| 5 | Helen Martin | 42 | wife | — | Pennsylvania |
| 6 | Dorothy Martin THIS PERSON | 21 | daughter | Typist | New Jersey |
| 7 | Marilyn Martin | 16 | daughter | — | New Jersey |
| 8 | Frederick Martin | 4 | son | — | Pennsylvania |
| 9 | Blanche Chambers | 54 | Lodger | — | Pennsylvania |
| 10 | Helen Chambers | 28 | Lodger | Teacher | Pennsylvania |
| 11 | Frederick Chambers | 27 | Lodger | Salesman | Pennsylvania |
| 12 | Frank H. Yerger | 64 | Head | — | Pennsylvania |
| 13 | John D. Yerger | 34 | son | Editor | Pennsylvania |
| 14 | Genevieve Yerger | 30 | daughter in law | — | Pennsylvania |
| 15 | Genevieve Yerger | 1 | daughter | — | Pennsylvania |
| 16 | Cyril Leach | 40 | Head | Manager | New York |
| 17 | Blanche Leach | 46 | wife | — | Louisiana |
| 18 | James D. Young | 66 | Head | — | Pennsylvania |
| 19 | Elizabeth Young | 64 | wife | — | Pennsylvania |
| 20 | Warren Young | 28 | son | Attendant | Pennsylvania |
| 21 | Samuel H. Wilson | 41 | son in law | Attendant | Pennsylvania |
| 22 | Dorothy Wilson | 38 | daughter | Typist | Pennsylvania |
| 23 | Clark Wright | 44 | Head | — | New Jersey |
| 24 | Elizabeth Wright | 41 | wife | — | Pennsylvania |
| 25 | Elizabeth Wright | 19 | daughter | — | Pennsylvania |
| 26 | Robert Wright | 13 | son | — | Pennsylvania |
| 27 | John Hertzler | 43 | Head | — | Pennsylvania |
| 28 | Florence Hertzler | 42 | wife | — | England |
| 29 | Elizabeth Brotherton | 73 | mother in law | — | England |
| 30 | E. Roy Doudie | 55 | Head | Salesman | New York |
| 31 | Dorothy Doudie | 32 | wife | — | Missouri |
| 32 | Anne S. Doudie | 17 | daughter | — | Missouri |
| 33 | Eloise Secor | 55 | mother in law | — | Massachusetts |
| 34 | Mabel Chandler | 57 | Head | — | England |
| 35 | Edward Chandler | 34 | son | Collector | Colorado |
| 36 | Basil Chandler | 18 | son | — | Pennsylvania |
| 37 | Sylvia Scott | 19 | daughter | — | Pennsylvania |
| 38 | Robert Scott | 15 | son | — | Pennsylvania |
| 39 | Cynthia Scott | 12 | daughter | — | Pennsylvania |
Pedigree Summary
Dorothy + 2 siblings
Gen 1 · 6 parents
~0.92
Max depth 4 (1900–1950 window)
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)