RM
Rosa Martin — 1940 US Census Record
Model Tree available1940 United States Federal Census · Allegany-County, Maryland
Our Model Tree links this Rosa Martin across the 1920, 1930 and 1940 US Censuses in Allegany-County, Maryland (XGBoost, ~Confirmed), with identified parents James & Emmaline — first a daughter (b.~1899), then head of a 4-person household.
Age 41
b. ~1899
Female
Daughter
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegany-County, Maryland |
| Surname | Martin |
| Given Name | Rosa |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 41 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (County) | Allegany |
| Additional Details | |
| Highest Grade | No 4 |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Dist 1 |
| Est. Birth Year | ~1899 |
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 Rosa | Age | Birth yr |
|---|---|---|---|---|
| Emmaline Martin | Head | — | 81 | ~1859 |
| Rosa Martin | Daughter | — | 41 | ~1899 |
| David Martin | Son | — | 57 | ~1883 |
| Georgia Martin | Daughter | — | 58 | ~1882 |
Census Appearances
1920
Allegany, Maryland
Daughter, age 21
Allegany, Maryland · implied b. ~1899 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Rose |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read | Yes |
| Can Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Allegany, Maryland
Other, age 31
Allegany, Maryland · implied b. ~1899 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | Rose |
| Relationship to Head | Sister |
| Sex | F |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegany-County, Maryland
Daughter, age 41
Allegany-County, Maryland · implied b. ~1899 — 4 household members
| Surname | Martin |
| Given Name | Rosa |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 41 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (County) | Allegany |
| Highest Grade | No 4 |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 Rosa Martin across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Martin (~0.92 confidence) and mother Emmaline Martin (~0.92 confidence) and mother Pauline Martin (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Martin
b. ~1851
Source father
● Household
· direct · ~0.92
Mother
Emmaline Martin
b. ~1859
Source mother
● Household
· direct · ~0.92
Mother
Pauline Martin
b. ~1860
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Rosa Martin
Daughter · 1940 · age 41 · b. ~1899 · Maryland
★ You are viewing this record
Sibling
Georgia Martin
Sibling · 1940 · age 58
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
David Martin
Sibling · 1940 · age 57
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 — Allegany-County, Maryland
Open full size
1940 US Federal Census — Allegany-County, Maryland
Page Contents
30 people indexed on this census page (nara:1940:m-t0627-01498-00024)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ruth Ann Mcdonald | 2 | Daughter | — | Maryland |
| 2 | Emmaline Martin | 81 | Head | — | Pennsylvania |
| 3 | David G Martin | 57 | Son | Rail Road | Pennsylvania |
| 4 | Georgia Martin | 58 | Daughter | — | West Virginia |
| 5 | Rosa Martin THIS PERSON | 41 | Daughter | — | Pennsylvania |
| 6 | Geo P Mcdonald | 45 | Head | Retired Rail Road | Maryland |
| 7 | Nelly G Mcdonald | 49 | Wife | — | Pennsylvania |
| 8 | Head Sarah B | None | F | — | — |
| 9 | Son Emanul H | None | M | — | — |
| 10 | Son Edward | None | M | Gw | — |
| 11 | Robert R Twigg | 62 | Head | — | Maryland |
| 12 | Margaret Twigg | 60 | Wife | — | Maryland |
| 13 | Ada Davis | 17 | S. Daughter | — | Maryland |
| 14 | John F Appel | 79 | Head | — | Maryland |
| 15 | Minnie A Appel | 69 | Wife | — | Maryland |
| 16 | Mason A Appel | 24 | Son | Wpa | Maryland |
| 17 | Julia E M Appel | 22 | Daughter | — | Maryland |
| 18 | Mason G Appel | 45 | Son | — | Indiana |
| 19 | Joseph R Appel | 2 | Son | — | Maryland |
| 20 | George T Cornwell | 24 | Head | Wpa | Maryland |
| 21 | Mattie M Cornwell | 18 | Wife | — | Maryland |
| 22 | Norma Lee Cornwell | 0 | Daughter | — | Maryland |
| 23 | Elmer P Appel | 35 | Head | Wpa | Maryland |
| 24 | Agnes S Appel | 32 | Wife | — | Maryland |
| 25 | Kenneth E Appel | 13 | Son | — | Maryland |
| 26 | Donald L Appel | 9 | Son | — | Maryland |
| 27 | Jeanette R Appel | 3 | Daughter | — | Maryland |
| 28 | Thomas Wayne Appel | 1 | Son | — | Maryland |
| 29 | Floyd Joy | 25 | Lodger | 48 | Maryland |
| 30 | John L Watson | 30 | Head | — | — |
Pedigree Summary
Rosa + 2 siblings
Gen 1 · 3 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)