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.~1923), then head of a 4-person household.
Age 17
b. ~1923
Male
Son
Born: Ohio
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Allegheny-County, Pennsylvania |
| Surname | Baird |
| Given Name | William J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | McKeesport City |
| 1935 Residence (County) | Allegheny |
| Additional Details | |
| Industry | S |
| Highest Grade | H-2 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Township / Ward | Mckeesport City |
| Est. Birth Year | ~1923 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Lydia Baird | Spouse | — | 40 | ~1900 |
| Spencer Baird | Head | — | 38 | ~1902 |
| William Baird | Son | — | 17 | ~1923 |
| Joan Baird | Daughter | — | 11 | ~1929 |
Census Appearances
1930
Allegheny, Pennsylvania
Son, age 7
Allegheny, Pennsylvania · implied b. ~1923 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Baird |
| Given Name | William J |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Ohio |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Allegheny-County, Pennsylvania
Son, age 17
Allegheny-County, Pennsylvania · implied b. ~1923 — 4 household members
| Surname | Baird |
| Given Name | William J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | McKeesport City |
| 1935 Residence (County) | Allegheny |
| Industry | S |
| Highest Grade | H-2 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
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 17 · b. ~1923 · Pennsylvania
★ You are viewing this record
Sibling
Joan Baird
Sibling · 1940 · age 11
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-t0627-03409-00637)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Patrick Federal | 58 | Lodger | Asst. Agt. Furnace Blower | Pennsylvania |
| 2 | Arthur H. Goodrow | 56 | Head | Manager | Indiana |
| 3 | Anna B. Goodrow | 53 | Wife | — | Pennsylvania |
| 4 | Eleanor Goodrow | 20 | Daughter | Typist | Pennsylvania |
| 5 | Mary Dobbs | 50 | Head | — | Pennsylvania |
| 6 | Ruth E. Gilderman | 17 | Daughter | — | Pennsylvania |
| 7 | William H. Stevenson | 55 | Head | Builder | Ohio |
| 8 | Eliza J. Stevenson | 54 | Wife | — | England |
| 9 | William H. Stevenson | 19 | Son | Laborer | Pennsylvania |
| 10 | Spencer Baird | 38 | Head | Manager | Pennsylvania |
| 11 | Lydia E. Baird | 40 | Wife | — | Ohio |
| 12 | William J. Baird THIS PERSON | 17 | Son | — | Ohio |
| 13 | Joan Baird | 11 | Daughter | — | Ohio |
| 14 | John B. Morgan | 50 | Head | Telegraph Operator | Pennsylvania |
| 15 | Grace S. Morgan | 41 | Wife | — | Nebraska |
| 16 | Alma Morgan | 13 | Daughter | — | Pennsylvania |
| 17 | Nancy Kite | 62 | Mother-in-law | — | Missouri |
| 18 | Hazel Kite | 33 | Sister-in-law | Oiler | Pennsylvania |
| 19 | Robert D. Kennedy | 42 | Head | Machinist | Pennsylvania |
| 20 | Ruth E. Kennedy | 42 | Wife | — | Pennsylvania |
| 21 | Robert B. Kennedy | 22 | Son | Machine Shop Office | Pennsylvania |
| 22 | Naomi H. Kennedy | 19 | Son | New Worker | Ohio |
| 23 | June Kennedy | 18 | Daughter | — | Pennsylvania |
| 24 | Calvin Kennedy | 16 | Son | — | Pennsylvania |
| 25 | William J. Peterson | 37 | Head | Foreman | Pennsylvania |
| 26 | Emma E. Peterson | 36 | Wife | — | Pennsylvania |
| 27 | William Peterson | 10 | Son | — | Pennsylvania |
| 28 | Robert Peterson | 10 | Son | — | Pennsylvania |
| 29 | Elmer Peterson | 1 | Son | — | Pennsylvania |
| 30 | Urban Imhof | 32 | Head | Truck Driver | Pennsylvania |
| 31 | Ann V. Imhof | 27 | Wife | — | Pennsylvania |
| 32 | Duane Imhof | 9 | Son | — | Pennsylvania |
| 33 | Shirley Imhof | 6 | Daughter | — | Pennsylvania |
| 34 | Gerald Imhof | 3 | Son | — | Pennsylvania |
| 35 | William H. Welch | 31 | Head | Truck Driver | Pennsylvania |
| 36 | Elsie S. Welch | 27 | Wife | — | Pennsylvania |
| 37 | Paul Welch | 18 | Son | New Worker | Pennsylvania |
| 38 | Elizabeth Reynolds | 65 | Mother | — | Pennsylvania |
| 39 | Mary J. Whelan | 50 | Head | — | Scotland |
| 40 | James Whelan | 50 | Son | Watchman | 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)