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Mary Baird — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Dupage, Illinois
Our Model Tree links this Mary Baird across the 1930 and 1940 US Censuses in Dupage, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1903), then head of a 8-person household.
Age 27
b. ~1903
Female
Daughter
Born: Scotland
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Dupage, Illinois |
| Surname | Baird |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Scotland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1910 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Additional Details | |
| Occupation | Clerk |
| Industry | Office |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
| Occupation | Clerk |
| Township / Ward | Village Of Villa Park |
| Est. Birth Year | ~1903 |
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.
8 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| William Baird | Head | — | 56 | ~1874 |
| Margaret Baird | Daughter | — | 11 | ~1919 |
| William Allen | Other | — | 4 | ~1926 |
| Margaret Allen | Other | — | 6 | ~1924 |
| James Baird | Son | — | 29 | ~1901 |
| Mary Baird | Daughter | — | 27 | ~1903 |
| Margaret Baird | Spouse | — | 56 | ~1874 |
| William Baird | Son | — | 23 | ~1907 |
Census Appearances
1930
Dupage, Illinois
Daughter, age 27
Dupage, Illinois · implied b. ~1903 — 8 household members
| Surname | Baird |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Scotland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1910 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Clerk |
| Industry | Office |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1940
Cook-County, Illinois
Spouse, age 36
Cook-County, Illinois · implied b. ~1904 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Baird |
| Given Name | Margaret |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Scotland |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Occupation | Clerk |
| Industry | Merchandise |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 800 |
| Highest Grade | C 8 |
| 1935 Residence | Same House |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
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 Baird across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Baird
Daughter · 1930 · age 27 · b. ~1903 · Illinois
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Sibling
Margaret Baird
Sibling · 1930 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Baird
Sibling · 1930 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Baird
Sibling · 1930 · age 29
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
1930 US Federal Census — Dupage, Illinois
Open full size
1930 US Federal Census — Dupage, Illinois
Page Contents
50 people indexed on this census page (ia:1930:illinoiscensus00reel511:0462)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Ruby B. Hafner | 11 | Son | — | Illinois |
| 52 | Arthur L. Cobb | 33 | Head | Repairman | Illinois |
| 53 | Agnes B. Cobb | 31 | Wife | — | Illinois |
| 54 | Anton M. Cobb | 3 | Son | — | Illinois |
| 55 | Paul S. Ferris | 45 | Head | Broker | Michigan |
| 56 | Gertrude H. Ferris | 31 | Wife | — | England |
| 57 | Emma E. Ferris | 7 | Daughter | — | Illinois |
| 58 | Jane Ferris | 3 | Daughter | — | Michigan |
| 59 | Albert Garrett | 35 | Head | Merchant | Illinois |
| 60 | Agnes Garrett | 43 | Wife | — | Czecho-Slovakia |
| 61 | George Garrett | 27 | Brother | Laborer | Illinois |
| 62 | William Baird | 56 | Head | Janitor | Scotland |
| 63 | Margaret Baird | 56 | Wife | — | Scotland |
| 64 | James M. Baird | 29 | Son | Accountant | Scotland |
| 65 | Mary Baird THIS PERSON | 27 | Daughter | Clerk | Scotland |
| 66 | William C. Baird | 23 | Son | Clerk | Scotland |
| 67 | Margaret Baird | 11 | Daughter | — | Illinois |
| 68 | Margaret G. Allen | 6 | Boarder | — | Illinois |
| 69 | William Allen | 4 | Boarder | — | Illinois |
| 70 | William H. Grosch | 36 | Head | Laborer | Illinois |
| 71 | Beda L. Grosch | 45 | Wife | — | Illinois |
| 72 | Myrtle Grosch | 12 | Daughter | — | Illinois |
| 73 | Lula Agnes Grosch | 10 | Daughter | Fireman | Illinois |
| 74 | Pearl Lucille Grosch | 7 | Daughter | — | Illinois |
| 75 | Victor Lundquist | 37 | Head | Salesman | Illinois |
| 76 | Emma S. Lundquist | 39 | Wife | — | Wisconsin |
| 77 | Robert G. Lundquist | 8 | Son | — | Illinois |
| 78 | Gerald Lundquist | 6 | Son | — | Illinois |
| 79 | John Dagy | 59 | Head | Blacksmith | Germany |
| 80 | Margaret R. Dagy | 59 | Wife | — | Roumania |
| 81 | John Dagy | 15 | Son | — | Illinois |
| 82 | Frank Mangialardi | 35 | Head | Laborer | Italy |
| 83 | Frankie Mangialardi | 34 | Wife | — | Italy |
| 84 | Yolanda Mangialardi | 11 | Daughter | — | Italy |
| 85 | John Mangialardi | 10 | Son | — | Italy |
| 86 | Rosie Mangialardi | 7 | Daughter | — | Illinois |
| 87 | Lawrence Mangialardi | 4 | Son | — | Illinois |
| 88 | Andrew Mangialardi | 31 | Brother | Laborer | Italy |
| 89 | Frank Ceresi | 41 | Head | Salesman | Italy |
| 90 | Margaret Ceresi | 42 | Wife | — | West Virginia |
| 91 | Thelma A. Ceresi | 15 | Daughter | — | Illinois |
| 92 | Anthony J. Ceresi | 13 | Son | Chauffeur | Illinois |
| 93 | John J. Ceresi | 12 | Son | — | Illinois |
| 94 | Amelia V. Ceresi | 12 | Son | — | Illinois |
| 95 | Rita M. Ceresi | 10 | Daughter | — | Illinois |
| 96 | Frank Ceresi | 8 | Son | — | Illinois |
| 97 | Fred Pentland | 43 | Head | Salesman | Illinois |
| 98 | Josephine Pentland | 44 | Wife | — | Wisconsin |
| 99 | Walter Pentland | 11 | Son | — | Illinois |
| 100 | Arthur Pentland | 9 | Son | — | Illinois |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)