MK
Mary Kirby — 1930 US Census Record
Model Tree available1930 United States Federal Census · Champaign, Illinois
Our Model Tree links this Mary Kirby across the 1910, 1920 and 1930 US Censuses in Champaign, Illinois (XGBoost, ~Confirmed), with identified parents E & Jesse — first a daughter (b.~1909), then head of a 5-person household.
Age 21
b. ~1909
Female
Daughter
Born: Illinois
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Champaign, Illinois |
| Surname | Kirby |
| Given Name | Mary L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Additional Details | |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Champaign Township |
| Est. Birth Year | ~1909 |
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 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Maxwell Kirby | Son | — | 23 | ~1907 |
| Carrie Kirby | Other | — | 55 | ~1875 |
| Richard Kirby | Son | — | 15 | ~1915 |
| E Kirby | Head | — | 58 | ~1872 |
| Mary Kirby | Daughter | — | 21 | ~1909 |
Census Appearances
1910
Champaign, Illinois
Daughter, age
Champaign, Illinois · implied b. ~1910 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kirby |
| Given Name | Mary M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1920
Champaign, Illinois
Daughter, age 10
Champaign, Illinois · implied b. ~1910 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kirby |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Champaign, Illinois
Daughter, age 21
Champaign, Illinois · implied b. ~1909 — 5 household members
| Surname | Kirby |
| Given Name | Mary L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 Kirby across 3 US Census years (1910, 1920 and 1930) in Champaign, Illinois, using XGBoost record linkage. Identified parents: father E Kirby (~0.92 confidence) and father Jesse Kirby (~0.92 confidence) and mother Sadie Kirby (~0.92 confidence) and mother Sadie Kirby (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
E Kirby
b. ~1872
Source father
● Household
· direct · ~0.92
Father
Jesse Kirby
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Sadie Kirby
b. ~1880
Source mother
● Household
· direct · ~0.92
Mother
Sadie Kirby
b. ~1883
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Kirby
Daughter · 1930 · age 21 · b. ~1909 · Illinois
★ You are viewing this record
Sibling
Maxwell Kirby
Sibling · 1930 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Kirby
Sibling · 1930 · age 15
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 — Champaign, Illinois
Open full size
1930 US Federal Census — Champaign, Illinois
Page Contents
50 people indexed on this census page (ia:1930:illinoiscensus00reel409:1045)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Marjorie Lynch | 3 | Daughter | None | Illinois |
| 2 | Betty Lou Lynch | 1 | Daughter | None | Illinois |
| 3 | William Kempachader | 55 | Head | Farmer | Illinois |
| 4 | Mary Kempachader | 44 | Wife-H | None | Illinois |
| 5 | Virginia Kempachader | 18 | Daughter | None | Illinois |
| 6 | Gerold Kempachader | 16 | Son | None | Illinois |
| 7 | Johnson Kempachader | 14 | Son | Farm Laborer | Illinois |
| 8 | Naomi Kempachader | 7 | Daughter | None | Illinois |
| 9 | Mary E. Kempachader | 4 | Daughter | None | Illinois |
| 10 | Hollis E. Markwell | 45 | Head | Farmer | Illinois |
| 11 | Gertrude Markwell | 38 | Wife-H | None | Illinois |
| 12 | Doyle W. Markwell | 14 | Son | None | Illinois |
| 13 | Wanda Markwell | 11 | Daughter | None | Illinois |
| 14 | Frank B. Haines | 58 | Head | Farmer | Illinois |
| 15 | Hattie Haines | 53 | Wife-H | None | Illinois |
| 16 | W. J. Bryant | 63 | Head | Farm Laborer | Illinois |
| 17 | Joshua C. Anderson | 32 | Head | Soil Analyst | Indiana |
| 18 | Myrtle P. Anderson | 38 | Wife-H | None | Indiana |
| 19 | Margaret E. Anderson | 18 | Daughter | None | Arkansas |
| 20 | Miriam J. Anderson | 11 | Daughter | None | Illinois |
| 21 | Harriett Levanell | 21 | Daughter | None | Arkansas |
| 22 | Joseph H. Levanell | 22 | Son-in-law | None | Illinois |
| 23 | Edward W. Baker | 50 | Assistant | Farm Laborer | Illinois |
| 24 | E. N. Kirby | 58 | Head | None Listed | Illinois |
| 25 | Carrie H. Kirby | 55 | Wife-H | None | Illinois |
| 26 | Maxwell Kirby | 23 | Son | Dairyman | Illinois |
| 27 | Mary L. Kirby THIS PERSON | 21 | Daughter | None | Illinois |
| 28 | Richard H. Kirby | 15 | Son | None | Illinois |
| 29 | William B. Winkler | 32 | Head | Horseman | Illinois |
| 30 | Nellie Winkler | 49 | Wife-H | None | Illinois |
| 31 | Kenneth Winkler | 20 | Son | None | Illinois |
| 32 | Helen Winkler | 15 | Daughter | None | Illinois |
| 33 | Everett Winkler | 12 | Son | None | Illinois |
| 34 | Jim Dorsey | 55 | Lodger | Laborer | Illinois |
| 35 | John A. Bates | 60 | Head | Farmer | Illinois |
| 36 | Harriett Bates | 58 | Wife-H | None | Illinois |
| 37 | Clinton Collins | 45 | Head | Farmer | Nebraska |
| 38 | Martha Collins | 40 | Wife-H | None | Illinois |
| 39 | Verna M. Collins | 17 | Daughter | None | Illinois |
| 40 | Charles N. Collins | 47 | Brother | Farmer | Illinois |
| 41 | Lewis W. Williams | 41 | Head | Teacher | Ohio |
| 42 | Gilene M. Williams | 32 | Wife-H | None | Pennsylvania |
| 43 | Lewis W. Jr. Williams | 11 | Son | None | Illinois |
| 44 | Anna Jane Williams | 9 | Daughter | None | Illinois |
| 45 | Frank M. Williams | 8 | Son | None | Illinois |
| 46 | William C. Wilson | 38 | Head | Yes | Irish Free State |
| 47 | Amy Wilson | 34 | Wife-H | None | Illinois |
| 48 | Kathryn Wilson | 13 | Daughter | None | Illinois |
| 49 | Evelyn Wilson | 10 | Daughter | None | Illinois |
| 50 | Bobby Wilson | 8 | Son | None | Illinois |
Pedigree Summary
Mary + 2 siblings
Gen 1 · 4 parents
~0.92
Max depth 4 (1900–1950 window)
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)