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Lawrence Martin — 1940 US Census Record
Model Tree available1940 United States Federal Census · Washington-County, Maryland
Our Model Tree links this Lawrence Martin across the 1920, 1930 and 1940 US Censuses in Washington-County, Maryland (XGBoost, ~Confirmed), with identified parents Isa & Lydia — first a head (b.~1915), then head of a 6-person household.
Age 25
b. ~1915
Male
Head
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Washington-County, Maryland |
| Surname | Martin |
| Given Name | Lawrence |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Washington |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farming |
| Class of Worker | OA |
| Hours Worked | 70 |
| Income (1939) | 0 |
| Highest Grade | 6 |
| 1935 Residence | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Farmer |
| Township / Ward | District 13 |
| 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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Lawrence | Age | Birth yr |
|---|---|---|---|---|
| Anna Martin | Other | — | 36 | ~1904 |
| Elmer Black | Other | — | 34 | ~1906 |
| Lawrence Martin | Son | — | 1 | ~1939 |
| Wilson Martin | Son | — | ~1940 | |
| Evelyn Martin | Spouse | — | 24 | ~1916 |
| Lawrence Martin | Head | — | 25 | ~1915 |
Census Appearances
1920
Washington, Maryland
Son, age 5
Washington, Maryland · implied b. ~1915 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Lawrence |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Maryland |
| Can Read | No |
| Can Write | No |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Washington, Maryland
Other, age 15
Washington, Maryland · implied b. ~1915 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Lawrence C. |
| Relationship to Head | Brother |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Maryland |
| Occupation | Laborer |
| Industry | General farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Washington-County, Maryland
Head, age 25
Washington-County, Maryland · implied b. ~1915 — 6 household members
| Surname | Martin |
| Given Name | Lawrence |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Washington |
| Occupation | Farmer |
| Industry | Farming |
| Class of Worker | OA |
| Hours Worked | 70 |
| Income (1939) | 0 |
| Highest Grade | 6 |
| 1935 Residence | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
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 Isa Martin (~0.92 confidence) and mother Lydia Martin (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Isa Martin
b. ~1892
Source father
● Household
· direct · ~0.92
Mother
Lydia Martin
b. ~1894
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Lawrence Martin
Head · 1940 · age 25 · b. ~1915 · Maryland
★ 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 — Washington-County, Maryland
Open full size
1940 US Federal Census — Washington-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01562-00435)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Charles E. Kountz | 61 | Head | — | Maryland |
| 2 | Ethel Kountz | 57 | Wife | — | Maryland |
| 3 | Robert Kountz | 29 | Son | Drug Clerk | Maryland |
| 4 | Elizabeth Kountz | 25 | Daughter | — | Maryland |
| 5 | Charles S. Kountz | 31 | Son | — | Pennsylvania |
| 6 | Virginia Kountz | 31 | Daughter-in-law | — | West Virginia |
| 7 | John T. Mcintyre | 37 | Head | Truck Driver | Pennsylvania |
| 8 | Lydia Mcintyre | 31 | Wife | — | Pennsylvania |
| 9 | Paul E. Mowen | 22 | Head | Operator | Pennsylvania |
| 10 | Winifred J. Mowen | 21 | Wife | — | Pennsylvania |
| 11 | David B. Harris | 55 | Head | — | Pennsylvania |
| 12 | Bessie G. Harris | 47 | Wife | — | Pennsylvania |
| 13 | Margaret Anthony | 73 | Head | — | Maryland |
| 14 | Chloe Anthony | 40 | Daughter | — | Maryland |
| 15 | Charles Reece | 48 | Head | Farmer | Maryland |
| 16 | William Reece | 22 | Son | Farm Hand | Maryland |
| 17 | Edna Kinsey | 41 | Sister-in-law | — | Maryland |
| 18 | Virginia Lou Kinsey | 1 | Niece | — | Maryland |
| 19 | Virgie O. Willy | 37 | Sister-in-law | — | Maryland |
| 20 | Marshello Grove | 53 | Head | Farmer | Maryland |
| 21 | Laura B. Grove | 52 | Wife | — | Maryland |
| 22 | Mary P. Grove | 21 | Daughter | — | West Virginia |
| 23 | Douglas E. Grove | 15 | Son | — | Maryland |
| 24 | Clara Grove | 62 | Sister | — | West Virginia |
| 25 | Harry Lucas | 60 | Hired Hand | Farm Laborer | Virginia |
| 26 | John D. Ringer | 58 | Head | Farmer | Maryland |
| 27 | Mabel Ringer | 53 | Wife | — | Pennsylvania |
| 28 | Sarah K. Ringer | 21 | Daughter | — | Maryland |
| 29 | Edith K. Ringer | 17 | Daughter | — | Maryland |
| 30 | Harry A. Alger | 35 | Head | Cabinet Maker | Virginia |
| 31 | Anna V. Alger | 33 | Wife | — | Virginia |
| 32 | Euna L. Alger | 15 | Daughter | — | Maryland |
| 33 | Lawrence Martin THIS PERSON | 25 | Head | Farmer | Maryland |
| 34 | Evelyn Martin | 24 | Wife | — | Maryland |
| 35 | Lawrence Martin | 1 | Son | — | Maryland |
| 36 | Wilson Martin | 0 | Son | — | Maryland |
| 37 | Anna Martin | 36 | Mother-in-law | Hired Girl | Maryland |
| 38 | Elmer Black | 34 | Hired Hand | Hired Hand | Maryland |
| 39 | John L. Worthington | 36 | Head | Chief Lineman | Maryland |
| 40 | Mary Louise Worthington | 14 | Daughter | — | Pennsylvania |
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)