MR
Mary Ross — 1940 US Census Record
Model Tree available1940 United States Federal Census · Plymouth-County, Massachusetts
Our Model Tree links this Mary Ross across the 1920, 1930 and 1940 US Censuses in Plymouth-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Harold & Harold — first a daughter (b.~1918), then head of a 7-person household.
Age 22
b. ~1918
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Plymouth-County, Massachusetts |
| Surname | Ross |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Hingham |
| 1935 Residence (County) | Plymouth |
| Additional Details | |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Hingham |
| 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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Catherine Ross | Daughter | — | 19 | ~1921 |
| Mary Ross | Daughter | — | 22 | ~1918 |
| Josephine Ross | Daughter | — | 15 | ~1925 |
| Harold Ross | Head | — | 49 | ~1891 |
| Amelia Johnson | Other | — | 62 | ~1878 |
| Arthur Johnson | Other | — | 61 | ~1879 |
| Lydia Ross | Spouse | — | 44 | ~1896 |
Census Appearances
1920
Plymouth, Massachusetts
Daughter, age 3
Plymouth, Massachusetts · implied b. ~1917 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Ross |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Plymouth, Massachusetts
Daughter, age 13
Plymouth, Massachusetts · implied b. ~1917 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Ross |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Plymouth-County, Massachusetts
Daughter, age 22
Plymouth-County, Massachusetts · implied b. ~1918 — 7 household members
| Surname | Ross |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Hingham |
| 1935 Residence (County) | Plymouth |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
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 Mary Ross across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Harold Ross (~0.92 confidence) and father Harold Ross (~0.92 confidence) and father Harold Ross (~0.92 confidence) and father John Ross (~0.84 confidence) and father John Ross (~0.84 confidence) and mother Catherine Ross (~0.84 confidence) and mother Lydia Ross (~0.92 confidence). The pedigree spans 2 generations with 7 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.89
Father
Harold Ross
b. ~1893
Source father
● Household
· direct · ~0.92
Father
Harold Ross
b. ~1891
Source father
● Household
· direct · ~0.92
Father
Harold Ross
b. ~1892
Source father
● Household
· direct · ~0.92
Father
John Ross
b. ~1866
Source father>father
● Household
· direct · ~0.84
Father
John Ross
b. ~1860
Source father>father
● Household
· direct · ~0.84
Mother
Catherine Ross
b. ~1863
Source father>mother
● Household
· direct · ~0.84
Mother
Lydia Ross
b. ~1897
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Ross
Daughter · 1940 · age 22 · b. ~1918 · Massachusetts
★ You are viewing this record
Sibling
Josephine Ross
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Ross
Sibling · 1940 · age 19
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 — Plymouth-County, Massachusetts
Open full size
1940 US Federal Census — Plymouth-County, Massachusetts
Page Contents
38 people indexed on this census page (nara:1940:m-t0627-01638-00328)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Dorothy Fairbanks | 57 | Wife | — | Massachusetts |
| 42 | Nora Doyle | 53 | Maid | Domestic | Eire |
| 43 | Petri | 23 | Maid | Houseman | Eire |
| 44 | Charles W. Hoyt | 59 | Head | Physician | Massachusetts |
| 45 | Mary W. Hoyt | 56 | Wife | — | Massachusetts |
| 46 | Carl A. Kronholm | 31 | Houseman | Houseman | Finland |
| 47 | Robert M. Prouty | 56 | Head | — | Massachusetts |
| 48 | Charlotte B. Prouty | 61 | Wife | — | Massachusetts |
| 49 | Alice E. Pope | 87 | Mother-in-law | — | Massachusetts |
| 50 | Bernard P. Hogan | 43 | Houseman | Houseman | Canada |
| 51 | Elizabeth G. Hogan | 28 | Maid | Domestic | England |
| 52 | Sophie G. Barbour | 48 | Nurse | Nurse | England |
| 55 | Harold S. Ross | 49 | Head | Merchant | Massachusetts |
| 56 | Lydia P. Ross | 44 | Wife | — | Massachusetts |
| 57 | Mary Ross THIS PERSON | 22 | Daughter | — | Massachusetts |
| 58 | Catherine S. Ross | 19 | Daughter | — | Massachusetts |
| 59 | Josephine D. Ross | 15 | Daughter | — | Massachusetts |
| 60 | Arthur Johnson | 61 | Houseman | Houseman | Sweden |
| 61 | Amelia B. Johnson | 62 | Maid | Domestic | Sweden |
| 62 | Jerome Preston | 41 | Head | Investment Banker | Massachusetts |
| 63 | Iina S. Preston | 41 | Wife | — | New York |
| 64 | Jerome Jr. Preston | 17 | Son | — | New York |
| 65 | Priscilla Preston | 14 | Daughter | — | Massachusetts |
| 66 | Nathaniel S. Preston | 12 | Son | — | Massachusetts |
| 67 | Aina Niemi | 50 | Maid | Domestic | Finland |
| 68 | Thomas S. Murphy | 56 | Head | — | England |
| 69 | Mabel A. Murphy | 56 | Wife | — | England |
| 70 | Malcolm C. Murphy | 26 | Son | — | Massachusetts |
| 71 | Albertina Pearson | 42 | Maid | Domestic | Sweden |
| 72 | Warren H. Bake-Childs | 59 | Head | Cabinet Maker | Massachusetts |
| 73 | Sybil A. Bake-Childs | 57 | Wife | Interior Decorator | California |
| 74 | Louville F. Niles | 29 | Head | Real Estate Agent | Massachusetts |
| 75 | Mary L. Niles | 29 | Wife | — | Massachusetts |
| 76 | John B. Niles | 2 | Son | — | Massachusetts |
| 77 | Katharine Niles | 1 | Daughter | — | Massachusetts |
| 78 | Rita Delorey | 21 | Maid | Domestic | Massachusetts |
| 79 | George S. Terry | 50 | Head | — | England |
| 80 | Ruth K. Terry | 49 | Wife | — | New York |
Pedigree Summary
Mary + 2 siblings
Gen 1 · 4 parents
~0.92
Gen 2 · 3 grandparents
~0.84
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)