GM
Grace Martin — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cuyahoga-County, Ohio
Our Model Tree links this Grace Martin across the 1920, 1930 and 1940 US Censuses in Cuyahoga-County, Ohio (XGBoost, ~Confirmed), with identified parents Knut & Robert — first a daughter (b.~1918), then head of a 4-person household.
Age 22
b. ~1918
Female
Daughter
Born: Ohio
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cuyahoga-County, Ohio |
| Surname | Martin |
| Given Name | Grace |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Cleveland city |
| 1935 Residence (County) | Cuyahoga |
| Additional Details | |
| Occupation | Comptometer operator |
| Industry | Retail Dairy |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 900 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Occupation | Comptometer Operator |
| Township / Ward | Cleveland City |
| Est. Birth Year | ~1918 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Grace | Age | Birth yr |
|---|---|---|---|---|
| William Martin | Son | — | 29 | ~1911 |
| Arthur Martin | Son | — | 25 | ~1915 |
| Robert Martin | Head | — | 55 | ~1885 |
| Grace Martin | Daughter | — | 22 | ~1918 |
Census Appearances
1920
Cuyahoga, Ohio
Daughter, age 1
Cuyahoga, Ohio · implied b. ~1919 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martinson |
| Given Name | Grace |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1930
Cuyahoga, Ohio
Daughter, age 11
Cuyahoga, Ohio · implied b. ~1919 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martinsen |
| Given Name | Grace |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Cuyahoga-County, Ohio
Daughter, age 22
Cuyahoga-County, Ohio · implied b. ~1918 — 4 household members
| Surname | Martin |
| Given Name | Grace |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Cleveland city |
| 1935 Residence (County) | Cuyahoga |
| Occupation | Comptometer operator |
| Industry | Retail Dairy |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 900 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
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 Grace Martin across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Knut Martinsen (~0.92 confidence) and father Robert Martin (~0.92 confidence) and father Gust Martinson (~0.92 confidence) and mother Maggie Martinson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Knut Martinsen
b. ~1885
Source father
● Household
· direct · ~0.92
Father
Robert Martin
b. ~1885
Source father
● Household
· direct · ~0.92
Father
Gust Martinson
b. ~1886
Source father
● Household
· direct · ~0.92
Mother
Maggie Martinson
b. ~1888
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Grace Martin
Daughter · 1940 · age 22 · b. ~1918 · Ohio
★ You are viewing this record
Sibling
William Martin
Sibling · 1940 · age 29
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Arthur Martin
Sibling · 1940 · age 25
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
1940 US Federal Census — Cuyahoga-County, Ohio
Open full size
1940 US Federal Census — Cuyahoga-County, Ohio
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03238-00061)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ethel Ely | 42 | Head | Bill Clerk | England |
| 2 | Mary Ely | 81 | Mother | — | Eire |
| 3 | Elmer Ely | 18 | Nephew | — | Ohio |
| 4 | Edward Harrison | 34 | Head | Patternmaker | England |
| 5 | Edna Harrison | 29 | Wife | — | Ohio |
| 6 | Nancy Harrison | 5 | Daughter | — | Ohio |
| 7 | Robert Harrison | 2 | Son | — | Ohio |
| 8 | John Walko | 30 | Head | Molder | Ohio |
| 9 | Margaret Walko | 27 | Wife | — | Ohio |
| 10 | Charles Mindock | 44 | Head | Laborer | Austria |
| 11 | Pauline Mindock | 43 | Wife | — | Austria |
| 12 | Pauline Mindock | 16 | Daughter | — | New York |
| 13 | Rose Mindock | 13 | Daughter | — | Cleveland |
| 14 | Bernice Mindock | 11 | Daughter | — | Cleveland |
| 15 | Elsie Mindock | 10 | Daughter | — | Cleveland |
| 16 | Robert M. Martin | 55 | Head | — | Scotland |
| 17 | William Martin | 29 | Son | Electrician | Ohio |
| 18 | Arthur Martin | 25 | Son | Truck Driver | Ohio |
| 19 | Grace Martin THIS PERSON | 22 | Daughter | Comptometer Operator | Ohio |
| 20 | Donald Clark | 27 | Head | Salesman | Ohio |
| 21 | Evelyn Clark | 26 | Wife | — | Ohio |
| 22 | Judith Clark | 2 | Daughter | — | Ohio |
| 23 | John Thomas | 35 | Head | Shipping Clerk | Ohio |
| 24 | Mary Thomas | 23 | Wife | — | Pennsylvania |
| 25 | Robert Thomas | 12 | Son | — | Ohio |
| 26 | Nancy Thomas | 5 | Daughter | — | Ohio |
| 27 | Edw. Bormann | 29 | Head | Truck Driver | Ohio |
| 28 | Elizabeth Bormann | 26 | Wife | Labeler | Ohio |
| 29 | Mary Brisinsky | 58 | Head | — | Hungary |
| 30 | Alex Brisinsky | 25 | Son | Marker | Ohio |
| 31 | Myron Brisinsky | 22 | Daughter | Office Clerk | Ohio |
| 32 | Harry Donnell | 32 | Head | Mechanic | Ohio |
| 33 | Anna Donnell | 28 | Wife | — | Ohio |
| 34 | Theodore Donnell | 5 | Son | — | Ohio |
| 35 | Amy Ann Donnell | 3 | Daughter | — | Ohio |
| 36 | Herbert Mueller | 35 | Lodger | Machinist | Ohio |
| 37 | Edward Hendricks | 32 | Head | Assistant Manager | Ohio |
| 38 | Dorothy Hendricks | 31 | Wife | — | Ohio |
| 39 | Doris Hendricks | 4 | Daughter | — | Ohio |
| 40 | Edward Hendricks | 2 | Son | — | Ohio |
Pedigree Summary
Grace + 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 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)