LM
Lawrence Martin — 1940 US Census Record
Model Tree available1940 United States Federal Census · San-Diego-County, California
Our Model Tree links this Lawrence Martin across the 1920, 1930 and 1940 US Censuses in San-Diego-County, California (XGBoost, ~Confirmed), with identified parents Joseph & Susan — first a head (b.~1900), then head of a 3-person household.
Age 40
b. ~1900
Male
Head
Born: Texas
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | San-Diego-County, California |
| Surname | Martin |
| Given Name | Lawrence W. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Texas |
| 1935 Residence (City) | San Diego City |
| 1935 Residence (County) | San Diego |
| Additional Details | |
| Occupation | Glazier |
| Industry | Retail Lumber Co. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1560 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Texas |
| Birth Country | United States |
| Birthplace (normalized) | texas |
| Occupation | Glazier |
| Township / Ward | San Diego City |
| Est. Birth Year | ~1900 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Lawrence | Age | Birth yr |
|---|---|---|---|---|
| Gladys Martin | Spouse | — | 37 | ~1903 |
| Robert Martin | Son | — | 17 | ~1923 |
| Lawrence Martin | Head | — | 40 | ~1900 |
Census Appearances
1920
San Diego, …
Son, age 20
San Diego, California · implied b. ~1900 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Lawrence |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Texas |
| Father's Birthplace | Alabama |
| Mother's Birthplace | Texas |
| Occupation | Laborer |
| Industry | Gas & Electric Co. |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Texas |
| Birth Country | United States |
| Birthplace (normalized) | texas |
1930
San Diego, …
Head, age 30
San Diego, California · implied b. ~1900 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Lawrence M |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Texas |
| Age at First Marriage | 21 |
| Father's Birthplace | Oklahoma |
| Mother's Birthplace | Texas |
| Occupation | Glazier |
| Industry | Glass Works |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 30.00 |
| Radio Set | R |
| Veteran | No |
| Birth State | Texas |
| Birth Country | United States |
| Birthplace (normalized) | texas |
1940
San-Diego-County, California
Head, age 40
San-Diego-County, California · implied b. ~1900 — 3 household members
| Surname | Martin |
| Given Name | Lawrence W. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Texas |
| 1935 Residence (City) | San Diego City |
| 1935 Residence (County) | San Diego |
| Occupation | Glazier |
| Industry | Retail Lumber Co. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1560 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Texas |
| Birth Country | United States |
| Birthplace (normalized) | texas |
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 Lawrence Martin across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Joseph Hallandigham (~0.92 confidence) and mother Susan Hallandigham (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Joseph Hallandigham
b. ~1851
Source father
● Household
· direct · ~0.92
Mother
Susan Hallandigham
b. ~1853
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Lawrence Martin
Head · 1940 · age 40 · b. ~1900 · California
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — San-Diego-County, California
Open full size
1940 US Federal Census — San-Diego-County, California
Page Contents
34 people indexed on this census page (nara:1940:m-t0627-00448-00396)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ida C. Wilson | 45 | Head | — | Illinois |
| 2 | Lawrence W. Martin THIS PERSON | 40 | Head | Glazier | Texas |
| 3 | Gladys Martin | 37 | Wife | — | Missouri |
| 4 | Robert Martin | 17 | Son | — | California |
| 5 | George A. Baker | 29 | Head | Sculptor | California |
| 6 | Mary Louise Baker | 25 | Wife | — | Oregon |
| 7 | Florence H. Harlee | 56 | Head | File Clerk | District of Col. |
| 8 | Vern Wm. Hawkins | 27 | Head | Bus Driver | Iowa |
| 9 | Lorna Hawkins | 24 | Wife | — | Florida |
| 10 | Charles Elmer Hedges | 26 | Head | Cook | Missouri |
| 11 | Homer Dana | 39 | Head | Sculptor | Washington |
| 12 | Donal Hood | 38 | Partner | Technical Supervisor | Wisconsin |
| 13 | John Fred Dietz | 84 | Head | — | Germany |
| 14 | Mary W. Dietz | 77 | Wife | — | Illinois |
| 15 | Fred G. Dietz | 19 | Grandson | Miner | Arizona |
| 16 | Lois Dietz | 18 | Granddaughter | — | California |
| 17 | Morris Rickerd | 27 | Head | Sheet Metal Worker | Michigan |
| 18 | Lauralee Rickerd | 23 | Wife | — | Tennessee |
| 19 | Russell Kent Rickerd | 4 | Son | — | Michigan |
| 20 | Danalie Rickerd | 1 | Daughter | — | California |
| 21 | Robert Barrett | 25 | Brother-in-law | Punch Press Operator | Tennessee |
| 22 | Roger W. Scott | 33 | Head | — | Massachusetts |
| 23 | Virginia Scott | 33 | Wife | — | Pennsylvania |
| 24 | Catherine S. Scott | 56 | Mother | — | Massachusetts |
| 25 | James Reid | 24 | Head | — | North Ireland |
| 26 | Mary Reid | 24 | Wife | — | California |
| 27 | Ernest Johnson | 69 | Head | Landlord | Ohio |
| 28 | Ethel Johnson | 51 | Wife | — | Kansas |
| 29 | George W. Felix | 42 | Head | Spot Welder | Arkansas |
| 30 | Lydia Felix | 46 | Wife | — | Minnesota |
| 31 | Karin Marguerite Felix | 26 | Daughter | — | South Dakota |
| 32 | Mary Bert M. Felix | 21 | Son | Spot Welder | South Dakota |
| 33 | William Kaiser | 3 | Grandson | — | California |
| 34 | William Schmidt | 34 | Head | Proprietor Partner | Illinois |
Pedigree Summary
Lawrence
Gen 1 · 2 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)