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Grace Martin — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Frederick-County, Maryland
Our Model Tree links this Grace Martin across the 1930 and 1940 US Censuses in Frederick-County, Maryland (XGBoost, ~Confirmed) — first a daughter (b.~1927), then head of a 9-person household.
Age 13
b. ~1927
Female
Daughter
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Frederick-County, Maryland |
| Surname | MARTIN |
| Given Name | GRACE |
| Relationship to Head | DAUGHTER |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Creagerstown |
| 1935 Residence (County) | Frederick |
| Additional Details | |
| Highest Grade | No 6 |
| 1935 Residence | Same House |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Creagerstown |
| Est. Birth Year | ~1927 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Grace | Age | Birth yr |
|---|---|---|---|---|
| Helen Martin | Daughter | — | 10 | ~1930 |
| Elmer Martin | Head | — | 35 | ~1905 |
| Franklin Martin | Son | — | 8 | ~1932 |
| Richard Martin | Son | — | 15 | ~1925 |
| Annabell Martin | Spouse | — | 33 | ~1907 |
| Robert Martin | Son | — | 11 | ~1929 |
| Grace Martin | Daughter | — | 13 | ~1927 |
| William Martin | Son | — | 1 | ~1939 |
| Ralph Martin | Son | — | 3 | ~1937 |
Census Appearances
1930
Frederick, Maryland
Daughter, age 3
Frederick, Maryland · implied b. ~1927 — 31 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Grace L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Frederick-County, Maryland
Daughter, age 13
Frederick-County, Maryland · implied b. ~1927 — 9 household members
| Surname | MARTIN |
| Given Name | GRACE |
| Relationship to Head | DAUGHTER |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Creagerstown |
| 1935 Residence (County) | Frederick |
| Highest Grade | No 6 |
| 1935 Residence | Same House |
| 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 Grace Martin across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Grace Martin
Daughter · 1940 · age 13 · b. ~1927 · Maryland
★ You are viewing this record
Sibling
William Martin
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ralph Martin
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Franklin Martin
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Martin
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Martin
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Martin
Sibling · 1940 · age 11
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 — Frederick-County, Maryland
Open full size
1940 US Federal Census — Frederick-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01548-00622)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Walter Hayes | 24 | SON | Laborer | FLORIDA |
| 2 | Catherine Hayes | 26 | DAUGHTER IN-LAW | — | VIRGINIA |
| 3 | William A Hayes | 2 | GRAND-SON | — | Maryland |
| 4 | Maurice F Whipp | 34 | HEAD | Mechanic | Maryland |
| 5 | Helen Whipp | 30 | WIFE | — | Maryland |
| 6 | Robert Whipp | 9 | SON | — | Maryland |
| 7 | Doris Whipp | 8 | DAUGHTER | — | Maryland |
| 8 | Bernard Whipp | 5 | SON | — | Maryland |
| 9 | Ralph Whipp | 3 | SON | — | Maryland |
| 10 | John F Byrne | 50 | HEAD | Operator | Pennsylvania |
| 11 | Josephine Byrne | 50 | WIFE | — | Pennsylvania |
| 12 | Mary Byrne | 20 | DAUGHTER | Secretary | Maryland |
| 13 | Robert Byrne | 15 | SON | — | Maryland |
| 14 | Catherine Byrne | 11 | DAUGHTER | — | Maryland |
| 15 | Theresa Byrne | 9 | DAUGHTER | — | Maryland |
| 16 | Morray Keyser | 71 | HEAD | Operator | Maryland |
| 17 | Grafton L Keyser | 35 | SON | Operator | Maryland |
| 18 | Agnes C Keyser | 32 | DAUGHTER IN-LAW | — | Maryland |
| 19 | Anthony P Jacobs | 21 | LODGER | Laborer | Maryland |
| 20 | Harold G Poole | 14 | LODGER | — | Maryland |
| 21 | Herbert Martin | 60 | HEAD | Carpenter | Maryland |
| 22 | Anna M Martin | 60 | WIFE | — | Maryland |
| 23 | Elmer Martin | 35 | HEAD | Laborer | Maryland |
| 24 | Annabell Martin | 33 | WIFE | — | Maryland |
| 25 | Richard Martin | 15 | SON | — | Maryland |
| 26 | Grace Martin THIS PERSON | 13 | DAUGHTER | — | Maryland |
| 27 | Robert Martin | 11 | SON | — | Maryland |
| 28 | Helen Martin | 10 | DAUGHTER | — | Maryland |
| 29 | Franklin Martin | 8 | SON | — | Maryland |
| 30 | Ralph Martin | 3 | SON | — | Maryland |
| 31 | William Martin | 1 | SON | — | Maryland |
| 32 | Ernest V Delphy | 41 | HEAD | Operator | Maryland |
| 33 | Alice M Delphy | 38 | WIFE | — | Maryland |
| 34 | George Delphy | 19 | SON | Laborer | Maryland |
| 35 | Melvin Delphy | 16 | SON | Laborer | Maryland |
| 36 | Delmar Delphy | 14 | SON | — | Maryland |
| 37 | Mazie Sunday | 36 | HEAD | — | Maryland |
| 38 | Ernest L Sunday | 17 | SON | — | Maryland |
| 39 | Pauline M Sunday | 16 | DAUGHTER | — | Maryland |
| 40 | Bettie L Sunday | 13 | DAUGHTER | Packer | Maryland |
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)