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Mary Fitzgerald — 1930 US Census Record
Model Tree available1930 United States Federal Census · San Francisco, California
Our Model Tree links this Mary Fitzgerald across the 1920, 1930 and 1940 US Censuses in San Francisco, California (XGBoost, ~Confirmed), with identified parents John & John — first a daughter (b.~1915), then head of a 5-person household.
Age 15
b. ~1915
Female
Daughter
Born: California
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | San Francisco, California |
| Surname | Fitzgerald |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Township / Ward | San Francisco |
| Est. Birth Year | ~1915 |
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 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Julia Fitzgerald | Daughter | — | 13 | ~1917 |
| Mary Fitzgerald | Daughter | — | 15 | ~1915 |
| John Fitzgerald | Head | — | 57 | ~1873 |
| Nora Fitzgerald | Other | — | 37 | ~1893 |
| John Fitzgerald | Son | — | 16 | ~1914 |
Census Appearances
1920
San Francisco, …
Daughter, age 5
San Francisco, California · implied b. ~1915 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Fitzgerald |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Speaks English | Yes |
| Mother Tongue | Irish |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1930
San Francisco, …
Daughter, age 15
San Francisco, California · implied b. ~1915 — 5 household members
| Surname | Fitzgerald |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
San-Francisco-County, California
Daughter, age 24
San-Francisco-County, California · implied b. ~1916 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Fitz Gerald |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | San Francisco |
| 1935 Residence (County) | San Francisco |
| Occupation | Stenographer |
| Industry | Historical Survey |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 765 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
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 Fitzgerald across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Fitzgerald (~0.92 confidence) and father John Fitzgerald (~0.92 confidence) and mother Nora Fitzgerald (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Fitzgerald
b. ~1873
Source father
● Household
· direct · ~0.92
Father
John Fitzgerald
b. ~1874
Source father
● Household
· direct · ~0.92
Mother
Nora Fitzgerald
b. ~1884
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Fitzgerald
Daughter · 1930 · age 15 · b. ~1915 · California
★ You are viewing this record
Sibling
Julia Fitzgerald
Sibling · 1930 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Fitzgerald
Sibling · 1930 · 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
1930 US Federal Census — San Francisco, California
Open full size
1930 US Federal Census — San Francisco, California
Page Contents
50 people indexed on this census page (ia:1930:californiacensus00reel197:0747)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ruth Olsen | 46 | Wife-H | — | Sweden |
| 2 | Hilma Olsen | 19 | Daughter | — | California |
| 3 | Johnston Benson | 72 | Head | Janitor | Virginia |
| 4 | Mary Benson | 57 | Wife-H | — | Iowa |
| 5 | Dewey Benson | 34 | Son | Salesman | Colorado |
| 6 | Hazel Benson | 38 | Daughter-in-law | — | Pennsylvania |
| 7 | Dominick Jungsteg | 54 | Head | Cook | Switzerland |
| 8 | Juliet Jungsteg | 54 | Wife-H | — | New York |
| 9 | Rudolph Jungsteg | 27 | Son | Salesman | California |
| 10 | Charles Jungsteg | 25 | Son | Chauffeur | California |
| 11 | Florence Jungsteg | 21 | Daughter | — | California |
| 12 | Henry Jungsteg | 18 | Son | Office Boy | California |
| 13 | John J. Fleming | 28 | Son-in-law | Marble Cutter | California |
| 14 | John Fitzgerald | 57 | Head | Janitor | Ireland |
| 15 | Nora Fitzgerald | 37 | Wife-H | — | Ireland |
| 16 | John Fitzgerald | 16 | Son | — | California |
| 17 | Mary Fitzgerald THIS PERSON | 15 | Daughter | — | California |
| 18 | Julia Fitzgerald | 13 | Daughter | — | California |
| 19 | Johanna Armitage | 67 | Head-H | — | Germany |
| 20 | Ralph Payne | 38 | Head | Marine Engineer | Washington |
| 21 | Annie Payne | 36 | Wife-H | — | California |
| 22 | Alana Payne | 13 | Daughter | — | California |
| 23 | Ralph Payne | 11 | Son | — | California |
| 24 | William Payne | 7 | Son | — | California |
| 25 | Fred Payne | 4 | Son | — | California |
| 26 | William Quirk | 38 | Brother-in-law | Stevedore | California |
| 27 | Clayton Quirk | 21 | Brother-in-law | Dentist | California |
| 28 | Emile Lacombe | 61 | Head | — | France |
| 29 | Mary Lacombe | 52 | Wife-H | — | France |
| 30 | Ernest Lacombe | 27 | Son | — | France |
| 31 | Mary Lacombe | 20 | Daughter | — | France |
| 32 | Noble Lacombe | 15 | Son | — | California |
| 33 | Fred Lundgren | 47 | Head | Ship Joiner | California |
| 34 | Elizabeth Lundgren | 45 | Wife-H | — | California |
| 35 | Herbert Lundgren | 24 | Son | — | California |
| 36 | Frank Clifford | 46 | Head | Blacksmith | Irish Free State |
| 37 | Mary Clifford | 45 | Wife-H | — | Irish Free State |
| 38 | Mary Clifford | 16 | Daughter | — | California |
| 39 | John Clifford | 14 | Son | — | California |
| 40 | Robert Clifford | 12 | Son | — | California |
| 41 | John Phipps | 52 | Head | Casket Maker | California |
| 42 | Ella Phipps | 44 | Wife-H | — | Wisconsin |
| 43 | Minnie Findley | 54 | Head-H | — | Canada-Eng |
| 44 | Hugh Findley | 32 | Son | Chauffeur | California |
| 45 | Edward Findley | 15 | Son | — | California |
| 46 | Robert Findley | 60 | Son | Salesman | Massachusetts |
| 47 | Louis H. Ludwig | 29 | Head | Sheet Metal | California |
| 48 | Anna M. Ludwig | 19 | Wife-H | — | Germany |
| 49 | Bertram Rudolph Ludwig | 26 | Lodger | Elec. Mechanic | Germany |
| 50 | Anna Zignoli | 4 | Lodger | — | California |
Pedigree Summary
Mary + 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 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)