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Helen Mcdonald — 1930 US Census Record
Model Tree available1930 United States Federal Census · Allegheny, Pennsylvania
Our Model Tree links this Helen Mcdonald across the 1920, 1930 and 1940 US Censuses in Allegheny, Pennsylvania (XGBoost, ~Confirmed), with identified parents Alexander & John — first a daughter (b.~1916), then head of a 7-person household.
Age 14
b. ~1916
Female
Daughter
Born: Pennsylvania
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Allegheny, Pennsylvania |
| Surname | McDonald |
| Given Name | Helen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Germany |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Pittsburgh City |
| Est. Birth Year | ~1916 |
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 1930 census.
| Name | Relation to head | Relative to Helen | Age | Birth yr |
|---|---|---|---|---|
| William Brannigan | Other | — | 24 | ~1906 |
| Dorothy Mcdonald | Daughter | — | 15 | ~1915 |
| Helen Mcdonald | Daughter | — | 14 | ~1916 |
| Ida Mcdonald | Other | — | 36 | ~1894 |
| Alexander Mcdonald | Head | — | 37 | ~1893 |
| Virginia Mcdonald | Daughter | — | 11 | ~1919 |
| Roy Shearer | Other | — | 30 | ~1900 |
Census Appearances
1920
Allegheny, Pennsylvania
Daughter, age 4
Allegheny, Pennsylvania · implied b. ~1916 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDonald |
| Given Name | Helen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Germany |
| Mother Tongue | German |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegheny, Pennsylvania
Daughter, age 14
Allegheny, Pennsylvania · implied b. ~1916 — 7 household members
| Surname | McDonald |
| Given Name | Helen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Germany |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Daughter, age 25
Allegheny-County, Pennsylvania · implied b. ~1915 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | MacDonald |
| Given Name | Helen Jane |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Occupation | Salesgirl |
| Industry | Department |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 720 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 Helen Mcdonald across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Alexander Mcdonald (~0.92 confidence) and father John Flannery (~0.92 confidence) and mother Annie Flannery (~0.92 confidence) and mother Julia Mcdonald (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Alexander Mcdonald
b. ~1893
Source father
● Household
· direct · ~0.92
Father
John Flannery
b. ~1874
Source father
● Household
· direct · ~0.92
Mother
Annie Flannery
b. ~1875
Source mother
● Household
· direct · ~0.92
Mother
Julia Mcdonald
b. ~1894
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Helen Mcdonald
Daughter · 1930 · age 14 · b. ~1916 · Pennsylvania
★ You are viewing this record
Sibling
Virginia Mcdonald
Sibling · 1930 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Mcdonald
Sibling · 1930 · age 15
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 — Allegheny, Pennsylvania
Open full size
1930 US Federal Census — Allegheny, Pennsylvania
Page Contents
41 people indexed on this census page (ia:1930:fifteenthcensus00reel1982:0075)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Deno Vanucci | 37 | Head | Contractor | Italy |
| 52 | Victoria Vanucci | 21 | Wife-H | — | Italy |
| 53 | Ralph Vanucci | 5 | Son | — | Pennsylvania |
| 54 | Robert J. Vanucci | 3 | Son | — | Pennsylvania |
| 55 | Gregory Vanucci | 1 | Son | — | Pennsylvania |
| 56 | Kiser Haczynski | 35 | Head | Disabled | Poland |
| 57 | Caroline Haczynski | 26 | Wife-H | — | Hungary |
| 58 | Lois Lola Haczynski | 9 | Daughter | — | Hungary |
| 59 | Theresa Haczynski | 7 | Daughter | — | Hungary |
| 60 | Ivin Pugliese | 32 | Head | Clerk | Italy |
| 61 | Marie Pugliese | 26 | Wife-H | — | Pennsylvania |
| 62 | Lucille Pugliese | 2 | Daughter | — | Pennsylvania |
| 63 | Grace Pugliese | 1 | Daughter | — | Pennsylvania |
| 64 | John Fritz | 64 | Head | — | Austria |
| 65 | Mary Fritz | 56 | Wife-H | — | Austria |
| 66 | Charles Fritz | 23 | Son | Driver | Pennsylvania |
| 67 | Marie Fritz | 17 | Daughter | Stenographer | Pennsylvania |
| 68 | Alexander Mcdonald | 37 | Head | Conductor | Pennsylvania |
| 69 | Ida Mcdonald | 36 | Wife-H | — | Germany |
| 70 | Dorothy Mcdonald | 15 | Daughter | — | Pennsylvania |
| 71 | Helen Mcdonald THIS PERSON | 14 | Daughter | — | Pennsylvania |
| 72 | Virginia Mcdonald | 11 | Daughter | — | Pennsylvania |
| 73 | William Brannigan | 24 | Brother-in-law | Laborer | Pennsylvania |
| 74 | Roy Shearer | 30 | Lodger | Driver | Pennsylvania |
| 75 | William Johnson | 42 | Head | Clerk | Pennsylvania |
| 76 | Margaret Johnson | 44 | Wife-H | — | Pennsylvania |
| 77 | Helen Johnson | 16 | Daughter | — | Pennsylvania |
| 78 | Charles L. Guckert | 29 | Head | Credit Clerk | Pennsylvania |
| 79 | Lily Guckert | 32 | Wife-H | Saleslady | Pennsylvania |
| 80 | Charles Jr. Guckert | 10 | Son | — | Pennsylvania |
| 81 | Henry E. Steir | 46 | Head | Laborer | Ohio |
| 82 | Elizabeth Steir | 45 | Wife-H | — | Pennsylvania |
| 83 | Charles F. Steir | 15 | Son | — | Ohio |
| 84 | Walter M. Murray | 28 | Head | Truck Driver | Pennsylvania |
| 85 | Vera C. Murray | 21 | Wife-H | — | Ohio |
| 86 | Betty Murray | 2 | Daughter | — | Pennsylvania |
| 87 | Walter Jr. Murray | 1 | Son | — | Pennsylvania |
| 88 | Gwendolyn Smith | 53 | Head | House Work | Pennsylvania |
| 89 | Nicholas Becker | 74 | Father-in-law | — | Germany |
| 90 | Mathilda Becker | 22 | Sister-in-law | — | Pennsylvania |
| 91 | Lawrence Haczynski | 31 | Brother | Laborer | Poland |
Pedigree Summary
Helen + 2 siblings
Gen 1 · 4 parents
~0.92
Max depth 4 (1900–1950 window)
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)