WB
William Baird — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Allegheny-County, Pennsylvania
Our Model Tree links this William Baird across the 1930 and 1940 US Censuses in Allegheny-County, Pennsylvania (XGBoost, ~Confirmed) — first a son (b.~1929), then head of a 5-person household.
Age 11
b. ~1929
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Baird |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Highest Grade | No 4 |
| 1935 Residence | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Reserve Township |
| Est. Birth Year | ~1929 |
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 William | Age | Birth yr |
|---|---|---|---|---|
| William Baird | Son | — | 11 | ~1929 |
| Marie Baird | Spouse | — | 31 | ~1909 |
| Ralph Baird | Son | — | 7 | ~1933 |
| William Baird | Head | — | 32 | ~1908 |
| Sandra Baird | Daughter | — | 4 | ~1936 |
Census Appearances
1930
Allegheny, Pennsylvania
Son, age 1
Allegheny, Pennsylvania · implied b. ~1929 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Baird |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Scotland |
| Mother's Birthplace | England |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Allegheny-County, Pennsylvania
Son, age 11
Allegheny-County, Pennsylvania · implied b. ~1929 — 5 household members
| Surname | Baird |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Pittsburgh |
| 1935 Residence (County) | Allegheny |
| Highest Grade | No 4 |
| 1935 Residence | Pennsylvania |
| 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 William Baird across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Baird
Son · 1940 · age 11 · b. ~1929 · Pennsylvania
★ You are viewing this record
Sibling
Ralph Baird
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Sandra Baird
Sibling · 1940 · age 4
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-t0627-03415-00731)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Margaret Mann | 32 | Daughter | — | Pennsylvania |
| 2 | Margaret Mann | 2 | Grand daughter | — | Pennsylvania |
| 3 | Joseph Mitchell | 32 | Son-in-law | Cost Clerk | Ohio |
| 4 | Marie Mitchell | 29 | Daughter | Stenographer | Pennsylvania |
| 5 | Joseph Mitchell | 4 | Grand son | — | Pennsylvania |
| 6 | Val Thoma | 54 | Head | Iron Worker | Pennsylvania |
| 7 | Marie Thoma | 53 | Wife | — | Pennsylvania |
| 8 | Joseph Thoma | 23 | Son | Laborer | Pennsylvania |
| 9 | Marcelle Thoma | 19 | Daughter | Sales Clerk | Pennsylvania |
| 10 | Raymond Thoma | 13 | Son | — | Pennsylvania |
| 11 | Jean Thoma | 12 | Daughter | — | Pennsylvania |
| 12 | Clara Thoma | 52 | Sister | — | Pennsylvania |
| 13 | Anthony Thoma | 50 | Brother | Proprietor | Pennsylvania |
| 14 | Elizabeth Thoma | 46 | Sister | Typist | Pennsylvania |
| 15 | William Baird | 32 | Head | Salesman | Pennsylvania |
| 16 | Marie Baird | 31 | Wife | — | Pennsylvania |
| 17 | William Baird THIS PERSON | 11 | Son | — | Pennsylvania |
| 18 | Ralph Baird | 7 | Son | — | Pennsylvania |
| 19 | Sandra Baird | 4 | Daughter | — | Pennsylvania |
| 20 | Charles Sauer | 55 | Head | Clerk | Pennsylvania |
| 21 | Nellie Sauer | 56 | Wife | — | Pennsylvania |
| 22 | William Simondel | 45 | Head | Printer | Pennsylvania |
| 23 | Irma Simondel | 43 | Wife | — | Pennsylvania |
| 24 | Ruth Simondel | 17 | Daughter | — | Pennsylvania |
| 25 | William Simondel | 14 | Son | — | Pennsylvania |
| 26 | Clarence Huchestein | 39 | Head | Wholesale Beer Distributor | Pennsylvania |
| 27 | Marie Huchestein | 39 | Wife | — | Czechoslovakia |
| 28 | Clarence Huchestein | 14 | Son | — | Pennsylvania |
| 29 | Margaret Huchestein | 83 | Mother | — | Pennsylvania |
| 30 | Edward Glady | 30 | Head | Proprietor | Pennsylvania |
| 31 | Delores Glady | 26 | Wife | — | Pennsylvania |
| 32 | Audrey Glady | 2 | Daughter | — | Pennsylvania |
| 33 | Charles Rogers | 34 | Head | Laborer | Pennsylvania |
| 34 | Elizabeth Rogers | 32 | Wife | — | Pennsylvania |
| 35 | Margaret Rogers | 9 | Daughter | — | Pennsylvania |
| 36 | Carl Rogers | 4 | Son | — | Pennsylvania |
| 37 | Francis Worst | 25 | Head | Laborer | Pennsylvania |
| 38 | Evelyn Worst | 25 | Wife | — | Pennsylvania |
| 39 | Francis Worst | 1 | Son | — | Pennsylvania |
| 40 | Thomas Raimondi | 29 | Head | Salesman | Pennsylvania |
Related Census Records
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)