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Margaret Mcdonald — 1940 US Census Record
Model Tree available1940 United States Federal Census · Lehigh-County, Pennsylvania
Our Model Tree links this Margaret Mcdonald across the 1920, 1930 and 1940 US Censuses in Lehigh-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Henry & Helen — first a daughter (b.~1917), then head of a 5-person household.
Age 23
b. ~1917
Female
Daughter
Born: New Jersey
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Lehigh-County, Pennsylvania |
| Surname | McDonald |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Allentown city |
| 1935 Residence (County) | Lehigh |
| Additional Details | |
| Occupation | Stenographer |
| Industry | Auto mfg. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1100 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Stenographer |
| Township / Ward | Allentown City |
| Est. Birth Year | ~1917 |
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 Margaret | Age | Birth yr |
|---|---|---|---|---|
| Frances Appel | Daughter | — | 25 | ~1915 |
| Margaret Mcdonald | Daughter | — | 23 | ~1917 |
| Rosemary Mcdonald | Daughter | — | 32 | ~1908 |
| Helen Mcdonald | Head | — | 59 | ~1881 |
| Cillen Appel | Other | — | 2 | ~1938 |
Census Appearances
1920
Lehigh, Pennsylvania
Daughter, age 3
Lehigh, Pennsylvania · implied b. ~1917 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDonald |
| Given Name | Margaret |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Occupation | none |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1930
Lehigh, Pennsylvania
Daughter, age 13
Lehigh, Pennsylvania · implied b. ~1917 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDonald |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Lehigh-County, Pennsylvania
Daughter, age 23
Lehigh-County, Pennsylvania · implied b. ~1917 — 5 household members
| Surname | McDonald |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Allentown city |
| 1935 Residence (County) | Lehigh |
| Occupation | Stenographer |
| Industry | Auto mfg. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1100 |
| Highest Grade | Hs 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 Margaret Mcdonald across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Henry Mcdonald (~0.92 confidence) and mother Helen Mcdonald (~0.92 confidence) and mother Helen Mcdonald (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Henry Mcdonald
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Helen Mcdonald
b. ~1881
Source mother
● Household
· direct · ~0.92
Mother
Helen Mcdonald
b. ~1882
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Margaret Mcdonald
Daughter · 1940 · age 23 · b. ~1917 · Pennsylvania
★ You are viewing this record
Sibling
Rosemary Mcdonald
Sibling · 1940 · age 32
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frances Appel
Sibling · 1940 · age 25
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 — Lehigh-County, Pennsylvania
Open full size
1940 US Federal Census — Lehigh-County, Pennsylvania
Page Contents
32 people indexed on this census page (nara:1940:m-t0627-03543-00102)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Albert Heiney | 35 | Son | Stock Clerk | Pennsylvania |
| 42 | Arlene Heiney | 25 | Daughter | Teacher | Pennsylvania |
| 43 | Mary S. Burger | 64 | Head | — | Pennsylvania |
| 44 | John Trimble | 54 | Head | Machinist | Pennsylvania |
| 45 | Arnetta Trimble | 52 | Wife | — | Pennsylvania |
| 46 | Robert Blevins | 47 | Head | Plasterer | Pennsylvania |
| 47 | Shirley Blevins | 47 | Wife | — | Pennsylvania |
| 48 | Robert J. Blevins | 18 | Son | — | Pennsylvania |
| 49 | Myrtle Kern | 43 | Head | Presser | Pennsylvania |
| 51 | Wayne Grumbein | 46 | Head | Worker | Pennsylvania |
| 52 | Bertha Grumbein | 44 | Wife | — | Pennsylvania |
| 53 | George Grumbein | 17 | Son | — | Pennsylvania |
| 54 | Ralph Grumbein | 15 | Son | — | Pennsylvania |
| 55 | Helen Mcdonald | 59 | Head | — | New Jersey |
| 56 | Rosemary Mcdonald | 32 | Daughter | Operator | New Jersey |
| 57 | Margaret Mcdonald THIS PERSON | 23 | Daughter | Stenographer | New Jersey |
| 58 | Frances Appel | 25 | Daughter | Operator | New Jersey |
| 59 | Cillen Appel | 2 | Gr. daughter | — | Pennsylvania |
| 60 | Chester Linthan | Linthicum | 47 | Head | Partner | Pennsylvania |
| 61 | Mabel Linthan | Linthicum | 44 | Wife | — | Pennsylvania |
| 62 | Enos Linthan | Linthicum | 25 | Son | Dispatcher | Pennsylvania |
| 63 | Fae Linthan | Linthicum | 22 | Daughter | Bookkeeper | Pennsylvania |
| 64 | Muriel Linthan | Linthicum | 19 | Daughter | Clerk | Pennsylvania |
| 65 | Charles Hoffman | 51 | Head | Tester | Pennsylvania |
| 66 | Ida Hoffman | 53 | Wife | — | Pennsylvania |
| 67 | Florence Hoffman | 23 | Daughter | Stenographer | Pennsylvania |
| 68 | Dorothy Hoffman | 22 | Daughter | Stenographer | Pennsylvania |
| 69 | Jeremiah M. Ritter | 59 | Head | Repairman | Pennsylvania |
| 70 | Katie A. Ritter | 55 | Wife | — | Pennsylvania |
| 71 | Allan Muschlick | 41 | Son-in-law | Attendant | Pennsylvania |
| 72 | Margery F. Muschlick | 37 | Daughter | — | Pennsylvania |
| 73 | Robert Muschlick | 7 | Grandson | — | Pennsylvania |
Pedigree Summary
Margaret + 2 siblings
Gen 1 · 3 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)