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Mary Boyd — 1940 US Census Record
Model Tree available1940 United States Federal Census · St.-Louis-City-County, Missouri
Our Model Tree links this Mary Boyd across the 1920, 1930 and 1940 US Censuses in St.-Louis-City-County, Missouri (XGBoost, ~Confirmed), with identified parents Ada & Mary — first a spouse (b.~1905), then head of a 5-person household.
Age 35
b. ~1905
Female
Spouse
Born: Missouri
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Louis-City-County, Missouri |
| Surname | Boyd |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Missouri |
| 1935 Residence (City) | St Louis (City) |
| 1935 Residence (County) | St. Louis City |
| Additional Details | |
| Highest Grade | S 4 |
| 1935 Residence | Same place |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
| Township / Ward | St Louis City |
| Est. Birth Year | ~1905 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Boyd | Daughter | — | 5 | ~1935 |
| Lucille Boyd | Daughter | — | 11 | ~1929 |
| Harry Boyd | Head | — | 49 | ~1891 |
| Franklin Boyd | Son | — | 3 | ~1937 |
| Mary Boyd | Spouse | — | 35 | ~1905 |
Census Appearances
1920
St Louis, …
Daughter, age 16
St Louis, Missouri · implied b. ~1904 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Boyd |
| Given Name | Mary A. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Missouri |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Missouri |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1930
St Louis, …
Daughter, age 26
St Louis, Missouri · implied b. ~1904 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Boyd |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Missouri |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Occupation | none |
| Can Read/Write | Yes |
| Home Owned/Rented | no |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1940
St.-Louis-City-County, Missouri
Spouse, age 35
St.-Louis-City-County, Missouri · implied b. ~1905 — 5 household members
| Surname | Boyd |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Missouri |
| 1935 Residence (City) | St Louis (City) |
| 1935 Residence (County) | St. Louis City |
| Highest Grade | S 4 |
| 1935 Residence | Same place |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
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 Boyd across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Ada Boyd (~0.92 confidence) and mother Mary Boyd (~0.92 confidence) and father Silas Boyd (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Ada Boyd
b. ~1870
Source mother
● Household
· direct · ~0.92
Mother
Mary Boyd
b. ~1873
Source mother
● Household
· direct · ~0.92
Father
Silas Boyd
b. ~1879
Source father
● Household
· direct · ~0.92
This person
Anchor record
Mary Boyd
Spouse · 1940 · age 35 · b. ~1905 · Missouri
★ 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 — St.-Louis-City-County, Missouri
Open full size
1940 US Federal Census — St.-Louis-City-County, Missouri
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02189-00349)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Thomas Beckley | 8 | son | — | Missouri |
| 42 | Rev Wisniewski | 63 | Head | Priest | Poland |
| 43 | Mary Pawlowski | 49 | Maid | Housekeeper | Poland |
| 44 | Mary Pawlowski | 35 | Head | Organist | Illinois |
| 45 | Anha Kasperska | 48 | Mother | Teacher | Ohio |
| 46 | Ladislaus Rafacz | 26 | Brother | Teacher | Pennsylvania |
| 47 | Anna Surja | 45 | Maid | Housekeeper | Poland |
| 48 | Laura Ehrhardt | 63 | Head | — | Missouri |
| 49 | Alfred Ehrhardt | 38 | son | Freight Handler | Missouri |
| 50 | William Ernshon | 44 | Head | Painter | Missouri |
| 51 | Carrie Ernshon | 38 | Wife | — | Missouri |
| 52 | William Jr Ernshon | 19 | son | Painter | Missouri |
| 53 | Caroline Ernshon | 17 | daughter | Newspaper | Missouri |
| 54 | Thomas Boyer | 52 | Head | Laborer | Illinois |
| 55 | Ester Boyer | 37 | Wife | — | Missouri |
| 56 | Evelyn Boyer | 9 | daughter | — | Missouri |
| 57 | Henry Ruz | 44 | Head | Proprietor | Missouri |
| 58 | — | None | — | — | — |
| 59 | Claude Geary | 45 | Head | Laborer | Tennessee |
| 60 | Mary Geary | 30 | Wife | — | Arkansas |
| 61 | Lucille Geary | 11 | daughter | — | Tennessee |
| 62 | Mary Geary | 2 | daughter | — | Missouri |
| 63 | Henry Grey | 60 | Head | Fireman | Illinois |
| 64 | Julia Grey | 61 | Wife | — | Missouri |
| 65 | Roy Hithite | 15 | Boarder | — | Missouri |
| 66 | Cora Roberts | 64 | Head | — | Indiana |
| 67 | Charles Elliott | 16 | Boarder | Newspaper | Missouri |
| 68 | Mary Robben | 57 | Head | — | Missouri |
| 69 | Francis Robben | 24 | son | Laborer | Missouri |
| 70 | Harry Sr Boyd | 49 | Head | Carpenter | Missouri |
| 71 | Mary Boyd THIS PERSON | 35 | Wife | — | Missouri |
| 72 | Lucille Boyd | 11 | daughter | — | Missouri |
| 73 | Mary Boyd | 5 | daughter | — | Missouri |
| 74 | Franklin Boyd | 3 | son | — | Missouri |
| 75 | Frank Sr Ackermann | 57 | Head | Freight Handler | Missouri |
| 76 | Anna Ackermann | 50 | Wife | — | Missouri |
| 77 | Rose Ackermann | 20 | daughter | Packer | Missouri |
| 78 | Frank Jr Ackermann | 18 | son | Errand Boy | Missouri |
| 79 | Harry Ackermann | 16 | son | Errand Boy | Missouri |
| 80 | Frances Ackermann | 14 | daughter | — | Missouri |
Pedigree Summary
Mary
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)