RM
Robert Mason — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this Robert Mason across the 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed) — first a son (b.~1915), then head of a 10-person household.
Age 25
b. ~1915
Male
Son
Born: Arkansas
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Mason |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Arkansas |
| 1935 Residence (City) | Blaine Hill |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Occupation | Laborer |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth State | Arkansas |
| Birth Country | United States |
| Birthplace (normalized) | arkansas |
| Occupation | Laborer |
| Township / Ward | Blaine Hill |
| Est. Birth Year | ~1915 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Monroe Sawyer | Daughter | — | 21 | ~1919 |
| Fannie Watts | Daughter | — | 20 | ~1920 |
| Maxine Mason | Daughter | — | 16 | ~1924 |
| Lena Sawyer | Daughter | — | 2 | ~1938 |
| John Mason | Head | — | 52 | ~1888 |
| Robert Watts | Other | — | 27 | ~1913 |
| Frances Watts | Other | — | 1 | ~1939 |
| Robert Mason | Son | — | 25 | ~1915 |
| Oza Mason | Son | — | 15 | ~1925 |
| Ilena Mason | Spouse | — | 42 | ~1898 |
Census Appearances
1930
Allegheny, Pennsylvania
Son, age 16
Allegheny, Pennsylvania · implied b. ~1914 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mason |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Arkansas |
| Father's Birthplace | Arkansas |
| Mother's Birthplace | Arkansas |
| Can Read/Write | Yes |
| Birth State | Arkansas |
| Birth Country | United States |
| Birthplace (normalized) | arkansas |
1940
Allegheny-County, Pennsylvania
Son, age 25
Allegheny-County, Pennsylvania · implied b. ~1915 — 10 household members
| Surname | Mason |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Arkansas |
| 1935 Residence (City) | Blaine Hill |
| 1935 Residence (County) | Allegheny |
| Occupation | Laborer |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth State | Arkansas |
| Birth Country | United States |
| Birthplace (normalized) | arkansas |
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 Mason across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Robert Mason
Son · 1940 · age 25 · b. ~1915 · Pennsylvania
★ You are viewing this record
Sibling
Lena Sawyer
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Monroe Sawyer
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Maxine Mason
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Oza Mason
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Fannie Watts
Sibling · 1940 · age 20
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 — Allegheny-County, Pennsylvania
Open full size
1940 US Federal Census — Allegheny-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03403-00381)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Jessie Sterling | 55 | Wife | — | Alabama |
| 42 | Lois M. Sterling | 22 | Daughter | Servant | Pennsylvania |
| 43 | Ethel Sterling | 20 | Daughter | Servant | Pennsylvania |
| 44 | Alnora L. Sterling | 17 | Daughter | — | Pennsylvania |
| 45 | Mathew Nemchick | 57 | Head | Roller | Czechoslovakia |
| 46 | Johanna Nemchick | 51 | Wife | — | Czechoslovakia |
| 47 | Anne Nemchick | 25 | Daughter | Waitress | Pennsylvania |
| 48 | John Nemchick | 24 | Son | — | Pennsylvania |
| 49 | Mary Nemchick | 22 | Daughter | Waitress | Pennsylvania |
| 50 | Joseph Nemchick | 19 | Son | New Worker | Pennsylvania |
| 51 | Nellie Nemchick | 15 | Daughter | — | Pennsylvania |
| 52 | Michael Nemchick | 30 | Head | Hook On | Czechoslovakia |
| 53 | Olga Nemchick | 23 | Wife | — | Pennsylvania |
| 54 | Michael Gogol | 54 | Head | — | Czechoslovakia |
| 55 | Anna Gogol | 51 | Wife | — | Czechoslovakia |
| 56 | Michael Gogol | 27 | Son | Laborer | Pennsylvania |
| 57 | George Gogol | 25 | Son | Miner | Pennsylvania |
| 58 | Paul Gogol | 22 | Son | Miner | Pennsylvania |
| 59 | Joseph Gogol | 21 | Son | Miner | Pennsylvania |
| 60 | Andrew Gogol | 20 | Son | Miner | Pennsylvania |
| 61 | Steve Gogol | 18 | Son | — | Pennsylvania |
| 62 | Mary Gogol | 15 | Daughter | — | Pennsylvania |
| 63 | Thomas Gogol | 12 | Son | — | Pennsylvania |
| 64 | John Palick | 68 | Head | Pension | Austria |
| 65 | Julia Palick | 59 | Wife | — | Austria |
| 66 | John Mason | 52 | Head | Laborer | Arkansas |
| 67 | Ilena Mason | 42 | Wife | — | S. Carolina |
| 68 | Robert Mason THIS PERSON | 25 | Son | Laborer | Arkansas |
| 69 | Maxine Mason | 16 | Daughter | Servant | Arkansas |
| 70 | Oza Mason | 15 | Son | — | Arkansas |
| 71 | Monroe Sawyer | 21 | Daughter | — | Arkansas |
| 72 | Lena M. Sawyer | 2 | Daughter | — | Pennsylvania |
| 73 | Fannie Watts | 20 | Daughter | — | Arkansas |
| 74 | Robert Watts | 27 | Son-in-law | Laborer | Alabama |
| 75 | Frances I. Watts | 1 | G. Daughter | — | Pennsylvania |
| 76 | Rufus Ryans | 50 | Head | — | Virginia |
| 77 | Hennie Ryans | 40 | Housekeeper | Housekeeper | S. Carolina |
| 78 | William A. Sakell | 56 | Head | Laborer | Yugoslavia |
| 79 | Hanna Sakell | 46 | Wife | — | Poland |
| 80 | Edward Sakell | 16 | Son | — | Pennsylvania |
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)