TM
Thelma Martin — 1920 US Census Record
Model Tree available1920 United States Federal Census · Alameda, California
Our Model Tree links this Thelma Martin across the 1910, 1920 and 1930 US Censuses in Alameda, California (XGBoost, ~Confirmed), with identified parents William & Wm — first a daughter (b.~1902), then head of a 5-person household.
Age 18
b. ~1902
Female
Daughter
Born: California
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | Alameda, California |
| Surname | Martin |
| Given Name | Thelma |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Additional Details | |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Township / Ward | Oakland City |
| Est. Birth Year | ~1902 |
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 1920 census.
| Name | Relation to head | Relative to Thelma | Age | Birth yr |
|---|---|---|---|---|
| Irene Martin | Daughter | — | 14 | ~1906 |
| Florence Martin | Spouse | — | 40 | ~1880 |
| William Martin | Head | — | 48 | ~1872 |
| Ellen Martin | Son | — | 16 | ~1904 |
| Thelma Martin | Daughter | — | 18 | ~1902 |
Census Appearances
1910
Alameda, California
Other, age 9
Alameda, California · implied b. ~1901 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martens |
| Given Name | Thelma Marion |
| Relationship to Head | Niece |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1920
Alameda, California
Daughter, age 18
Alameda, California · implied b. ~1902 — 5 household members
| Surname | Martin |
| Given Name | Thelma |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1930
Alameda, California
Daughter, age 29
Alameda, California · implied b. ~1901 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Theodore |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | California |
| Mother's Birthplace | California |
| Occupation | Stenographer |
| Industry | City |
| 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 Thelma Martin across 3 US Census years (1910, 1920 and 1930) in Alameda, California, using XGBoost record linkage. Identified parents: father William Martin (~0.92 confidence) and father Wm Martin (~0.92 confidence) and mother Eliza Martin (~0.92 confidence) and mother Florence Martin (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Martin
b. ~1872
Source father
● Household
· direct · ~0.92
Father
Wm Martin
b. ~1869
Source father
● Household
· direct · ~0.92
Mother
Eliza Martin
b. ~1871
Source mother
● Household
· direct · ~0.92
Mother
Florence Martin
b. ~1880
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Thelma Martin
Daughter · 1920 · age 18 · b. ~1902 · California
★ You are viewing this record
Sibling
Ellen Martin
Sibling · 1920 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Irene Martin
Sibling · 1920 · age 14
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
1920 US Federal Census — Alameda, California
Open full size
1920 US Federal Census — Alameda, California
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu090unit:0929)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Edna | 5 | daughter | None | California |
| 2 | Elsie | 4 | daughter | None | California |
| 3 | Charles Prantz | 35 | head | Designer | California |
| 4 | Isabel Prantz | 40 | wife | None | Scotland |
| 5 | Edward Whyte | 34 | brother-in-law | Carpenter | Vermont |
| 6 | William Martin | 48 | head | Master Mariner | California |
| 7 | Florence Martin | 40 | wife | None | California |
| 8 | Thelma Martin THIS PERSON | 18 | daughter | None | California |
| 9 | Ellen Martin | 16 | son | None | California |
| 10 | Irene Martin | 14 | daughter | None | California |
| 11 | Ray C. Martin | 41 | head | Carpenter | California |
| 12 | Irma Martin | 39 | wife | None | California |
| 13 | Verna Martin | 15 | daughter | None | California |
| 14 | Milton Martin | 13 | son | None | California |
| 15 | Thomas Lydiksen | 35 | head | Carpenter | California |
| 16 | Ruth Lydiksen | 24 | wife | None | California |
| 17 | Jean Lydiksen | 2 | daughter | None | California |
| 18 | Charles H. Rowlands | 46 | head | Trainman | Iowa |
| 19 | Mary E. Rowlands | 45 | wife | None | Nevada |
| 20 | Herbert Rowlands | 13 | son | None | California |
| 21 | Olaf Anderson | 60 | head | Master Mariner | Norway |
| 22 | Andrea Anderson | 55 | wife | None | Norway |
| 23 | Arthur J. Anderson | 25 | son | Engineer | California |
| 24 | Margie Anderson | 22 | daughter | Stenographer | California |
| 25 | John Ramos | 37 | head | Machinist | California |
| 26 | Mary Ramos | 31 | wife | None | California |
| 27 | Anthony Jr. Ramos | 1 | son | None | California |
| 28 | Emil Erickson | 57 | head | Master Mariner | Norway |
| 29 | Margaret Erickson | 46 | wife | None | Ireland |
| 30 | Jefferson D. Kelley | 46 | head | Machinist | California |
| 31 | May Kelley | 44 | wife | None | Indiana |
| 32 | Christian Lund | 43 | head | Contractor | California |
| 33 | Christina Lund | 44 | wife | None | California |
| 34 | Pearl B. Lund | 19 | daughter | Bookkeeper | California |
| 35 | Bernice Lund | 16 | daughter | None | California |
| 36 | Charles Nelson | 40 | head | Nurseryman | Denmark |
| 37 | John E. Tellefsen | 26 | roomer | Helper | Norway |
| 38 | Anton Landeen | 58 | head | Master Mariner | Norway |
| 39 | Emma Landeen | 51 | wife | None | Australia |
| 40 | A. Told Landeen | 28 | son | Tailor | Australia |
| 41 | Constance Landeen | 25 | daughter | Bookkeeper | California |
| 42 | Adelaide Landeen | 24 | daughter | Supervisor | California |
| 43 | Robert Landeen | 18 | son | None | California |
| 44 | Fredrick W. Stover | 45 | head | Sticker Hand | California |
| 45 | Minnie A. Stover | 45 | wife | None | California |
| 46 | William Hunter | 54 | head | Janitor | Scotland |
| 47 | Jane Hunter | 54 | wife | None | Scotland |
| 48 | Jessie Hunter | 32 | daughter | Dressmaker | Scotland |
| 49 | Flora Fox | 29 | daughter | Packer | Scotland |
| 50 | William Fox | 9 | grandson | None | New York |
Pedigree Summary
Thelma + 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 1920 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)