MC
Martha Cooper — 1930 US Census Record
Model Tree available1930 United States Federal Census · San Francisco, California
Our Model Tree links this Martha Cooper across the 1910, 1920 and 1930 US Censuses in San Francisco, California (XGBoost, ~Confirmed), with identified parents Archibald & Martha — first a daughter (b.~1909), then head of a 7-person household.
Age 21
b. ~1909
Female
Daughter
Born: California
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | San Francisco, California |
| Surname | Cooper |
| Given Name | Martha E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Additional Details | |
| Occupation | Typist |
| Industry | Mining Co. |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Occupation | Typist |
| Township / Ward | San Francisco City |
| Est. Birth Year | ~1909 |
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 Martha | Age | Birth yr |
|---|---|---|---|---|
| Archibald Cooper | Head | — | 54 | ~1876 |
| Russell Champion | Other | — | 22 | ~1908 |
| Martha Cooper | Spouse | — | 54 | ~1876 |
| Frank Cooper | Son | — | 16 | ~1914 |
| Martha Cooper | Daughter | — | 21 | ~1909 |
| Jane Champion | Daughter | — | 20 | ~1910 |
| Archie Cooper | Son | — | 19 | ~1911 |
Census Appearances
1910
San Francisco, …
Daughter, age 2
San Francisco, California · implied b. ~1908 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | Martha |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1920
San Francisco, …
Daughter, age 11
San Francisco, California · implied b. ~1909 — 12 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | Martha |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1930
San Francisco, …
Daughter, age 21
San Francisco, California · implied b. ~1909 — 7 household members
| Surname | Cooper |
| Given Name | Martha E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Typist |
| Industry | Mining Co. |
| Class of Worker | W |
| Can Read/Write | Yes |
| 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 Martha Cooper across 3 US Census years (1910, 1920 and 1930) in San Francisco, California, using XGBoost record linkage. Identified parents: father Archibald Cooper (~0.92 confidence) and mother Martha Cooper (~0.92 confidence) and mother Martha Cooper (~0.92 confidence) and mother Martha Cooper (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Archibald Cooper
b. ~1876
Source father
● Household
· direct · ~0.92
Mother
Martha Cooper
b. ~1876
Source mother
● Household
· direct · ~0.92
Mother
Martha Cooper
b. ~1888
Source mother
● Household
· direct · ~0.92
Mother
Martha Cooper
b. ~1876
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Martha Cooper
Daughter · 1930 · age 21 · b. ~1909 · California
★ You are viewing this record
Sibling
Archie Cooper
Sibling · 1930 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jane Champion
Sibling · 1930 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frank Cooper
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
49 people indexed on this census page (ia:1930:californiacensus00reel198:0780)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Henry J. Nieman | 53 | Head | Tile Setter | Pennsylvania |
| 2 | Margaret Nieman | 45 | Wife | — | Germany |
| 3 | Margaret Nieman | 22 | Daughter | Stenographer | California |
| 4 | Henry Nieman | 21 | Son | Seaman | California |
| 5 | Edward Nieman | 10 | Son | — | California |
| 6 | George S. Chase | 74 | Head | Engineer | California |
| 7 | Marie A. Chase | 35 | Wife | — | Michigan |
| 8 | Julius M. Ritz | 72 | Head | Cook | Germany |
| 9 | Agnes Ritz | 67 | Wife | — | Germany |
| 10 | Gustave Starnowski | 77 | Head | — | Sweden |
| 11 | Gustave Starnowski | 37 | Son | Nightman | Pennsylvania |
| 12 | Ruth Starnowski | 37 | Daughter-in-law | — | California |
| 13 | Archibald Cooper | 54 | Head | Painter | Scotland |
| 14 | Martha E. Cooper | 54 | Wife | — | Scotland |
| 15 | Martha E. Cooper THIS PERSON | 21 | Daughter | Typist | California |
| 16 | Archie Cooper | 19 | Son | Driver | California |
| 17 | Frank Cooper | 16 | Son | — | California |
| 18 | Jane Champion | 20 | Daughter | Stenographer | California |
| 19 | Russell Champion | 22 | Son-in-law | Agent | California |
| 20 | John Morrow | 55 | Head | Painter | England |
| 21 | Constance Morrow | 35 | Wife | — | England |
| 22 | Jennie Morrow | 3 | Daughter | — | California |
| 23 | Gabriel Gomez | 35 | Head | Cook | Mexico |
| 24 | Margaret Gomez | 37 | Wife | — | Scotland |
| 25 | Eleanor Gomez | 11 | Daughter | — | California |
| 26 | Margaret Gomez | 7 | Daughter | — | California |
| 27 | Charles Moore | 74 | Head | Gen. Practitioner | Maine |
| 28 | Lena Moore | 53 | Wife | Saleslady | Massachusetts |
| 29 | Thomas Williams | 56 | Head | Valet Lady | Wales |
| 30 | Emma Stewart | 67 | Head | — | Maryland |
| 31 | Robert S. Stewart | 51 | Son | Carpenter | California |
| 32 | Frederick B. Stewart | 48 | Son | Carpenter | California |
| 33 | Reginald Stewart | 46 | Son | Photographer | California |
| 34 | Harry S. Stewart | 38 | Son | Plumber | California |
| 35 | Jane Stewart | 35 | Daughter | — | Illinois |
| 36 | Constance Stewart | 16 | Granddaughter | — | California |
| 37 | Daniel S. Stewart | 11 | Grandson | — | California |
| 38 | Mary B. Stewart | 7 | Granddaughter | — | California |
| 39 | John L. Landry | 40 | Head | Carpenter | Prince Edward Island |
| 40 | Ellen Landry | 39 | Wife | — | Scotland |
| 41 | Erica Landry | 6 | Daughter | — | California |
| 42 | Edgar B. Hopper | 38 | Head | Cook | Nebraska |
| 43 | Blanche Hopper | 37 | Wife | Stenographer | New York |
| 44 | Armand Hopper | 1 | Son | — | California |
| 45 | Marie Bernard | 58 | Mother-in-law | — | France |
| 46 | Thomas Mulgrew | 39 | Head | Painter | Scotland |
| 47 | Margaret Mulgrew | 40 | Wife | — | Scotland |
| 48 | Mary Mulgrew | 14 | Daughter | — | California |
| 49 | James Mulgrew | 12 | Son | — | California |
Pedigree Summary
Martha + 3 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)