RB
Robert Boyd — 1940 US Census Record
Model Tree available1940 United States Federal Census · Philadelphia-County, Pennsylvania
Our Model Tree links this Robert Boyd across the 1920, 1930 and 1940 US Censuses in Philadelphia-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Alice & Crosby — first a son (b.~1916), then head of a 5-person household.
Age 24
b. ~1916
Male
Son
Born: Pennsylvania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Philadelphia-County, Pennsylvania |
| Surname | BOYD |
| Given Name | ROBERT JR. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Philadelphia |
| 1935 Residence (County) | Philadelphia |
| Additional Details | |
| Highest Grade | C 6 |
| 1935 Residence | Same House |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Philadelphia |
| Est. Birth Year | ~1916 |
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 Robert | Age | Birth yr |
|---|---|---|---|---|
| Margaret Boyd | Daughter | — | 20 | ~1920 |
| Robert Boyd | Head | — | 51 | ~1889 |
| Robert Boyd | Son | — | 24 | ~1916 |
| James Boyd | Son | — | 19 | ~1921 |
| Jennie Boyd | Spouse | — | 49 | ~1891 |
Census Appearances
1920
Philadelphia, Pennsylvania
Son, age 4
Philadelphia, Pennsylvania · implied b. ~1916 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Boyd |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | New York |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Philadelphia, Pennsylvania
Son, age 14
Philadelphia, Pennsylvania · implied b. ~1916 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Boyd |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| 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
Philadelphia-County, Pennsylvania
Son, age 24
Philadelphia-County, Pennsylvania · implied b. ~1916 — 5 household members
| Surname | BOYD |
| Given Name | ROBERT JR. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Philadelphia |
| 1935 Residence (County) | Philadelphia |
| Highest Grade | C 6 |
| 1935 Residence | Same House |
| 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 Robert Boyd across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Alice Boyd (~0.92 confidence) and father Crosby Boyd (~0.92 confidence) and father Robert Boyd (~0.92 confidence) and father Francis Boyd (~0.92 confidence) and mother Jennie Boyd (~0.92 confidence) and mother Catherine Boyd (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Alice Boyd
b. ~1887
Source mother
● Household
· direct · ~0.92
Father
Crosby Boyd
b. ~1889
Source father
● Household
· direct · ~0.92
Father
Robert Boyd
b. ~1889
Source father
● Household
· direct · ~0.92
Father
Francis Boyd
b. ~1890
Source father
● Household
· direct · ~0.92
Mother
Jennie Boyd
b. ~1891
Source mother
● Household
· direct · ~0.92
Mother
Catherine Boyd
b. ~1893
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Boyd
Son · 1940 · age 24 · b. ~1916 · Pennsylvania
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Sibling
Margaret Boyd
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Boyd
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 — Philadelphia-County, Pennsylvania
Open full size
1940 US Federal Census — Philadelphia-County, Pennsylvania
Page Contents
15 people indexed on this census page (nara:1940:m-t0627-03717-00429)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Patricia Myers | 5 | Grand daughter | — | Pennsylvania |
| 2 | William Mcdaniels | 75 | Head | — | Pennsylvania |
| 3 | Teresa Landy | 65 | Housekeeper | — | Northern Ireland |
| 4 | Elizabeth Nichols | 63 | Head | School Teacher | Pennsylvania |
| 5 | Robert Sr. Boyd | 51 | Head | Proprietor | Pennsylvania |
| 6 | Jennie Boyd | 49 | Wife | — | Pennsylvania |
| 7 | Margaret Boyd | 20 | Daughter | — | Pennsylvania |
| 8 | James Boyd | 19 | Son | — | Pennsylvania |
| 9 | Robert Jr. Boyd THIS PERSON | 24 | Son | — | Pennsylvania |
| 10 | Walter Sr. Ulmer | 33 | Head | Clerk | Pennsylvania |
| 11 | Henrietta Ulmer | 30 | Wife | — | Pennsylvania |
| 12 | Walter Jr. Ulmer | 13 | Son | — | Pennsylvania |
| 13 | Carl Ulmer | 10 | Son | — | Pennsylvania |
| 14 | Leroy Ulmer | 8 | Son | — | Pennsylvania |
| 15 | Henrietta Ulmer | 6 | Daughter | — | Pennsylvania |
Pedigree Summary
Robert + 2 siblings
Gen 1 · 6 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)