LC
Lillian Cook — 1940 US Census Record
Model Tree available1940 United States Federal Census · Ottawa-County, Michigan
Our Model Tree links this Lillian Cook across the 1920, 1930 and 1940 US Censuses in Ottawa-County, Michigan (XGBoost, ~Confirmed), with identified parents Egbert & Sybrant — first a daughter (b.~1915), then head of a 2-person household.
Age 25
b. ~1915
Female
Daughter
Born: Michigan
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Ottawa-County, Michigan |
| Surname | Cook |
| Given Name | Lillian |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Eastmanville |
| 1935 Residence (County) | Ottawa |
| Additional Details | |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Township / Ward | Eastmanville |
| 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.
2 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Lillian | Age | Birth yr |
|---|---|---|---|---|
| Jennie Cook | Head | — | 72 | ~1868 |
| Lillian Cook | Daughter | — | 25 | ~1915 |
Census Appearances
1920
Ottawa, Michigan
Daughter, age 5
Ottawa, Michigan · implied b. ~1915 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cook |
| Given Name | Lillian |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Michigan |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1930
Ottawa, Michigan
Daughter, age 15
Ottawa, Michigan · implied b. ~1915 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cook |
| Given Name | Lillian M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Michigan |
| Can Read/Write | Yes |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
Ottawa-County, Michigan
Daughter, age 25
Ottawa-County, Michigan · implied b. ~1915 — 2 household members
| Surname | Cook |
| Given Name | Lillian |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Eastmanville |
| 1935 Residence (County) | Ottawa |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
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 Lillian Cook across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Egbert Cook (~0.92 confidence) and father Sybrant Cook (~0.92 confidence) and mother Jennie Cook (~0.92 confidence) and mother Jennie Cook (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Egbert Cook
b. ~1863
Source father
● Household
· direct · ~0.92
Father
Sybrant Cook
b. ~1863
Source father
● Household
· direct · ~0.92
Mother
Jennie Cook
b. ~1869
Source mother
● Household
· direct · ~0.92
Mother
Jennie Cook
b. ~1868
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Lillian Cook
Daughter · 1940 · age 25 · b. ~1915 · Michigan
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Ottawa-County, Michigan
Open full size
1940 US Federal Census — Ottawa-County, Michigan
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01809-00413)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Jennie Cook | 72 | Head | — | Michigan |
| 42 | Lillian Cook THIS PERSON | 25 | Daughter | — | Michigan |
| 43 | Jake Stronen | 40 | Head | Farm Laborer | Michigan |
| 44 | Alvina Stronen | 42 | Wife | — | Michigan |
| 45 | Glen Stronen | 15 | Son | — | Michigan |
| 46 | Mildred Stronen | 14 | Daughter | — | Michigan |
| 47 | James Stronen | 13 | Son | — | Michigan |
| 48 | Martin Riekens | 79 | Head | — | Michigan |
| 49 | Mary Riekens | 73 | Wife | — | Netherlands |
| 50 | Clarence Rice | 47 | Head | Farm Manager | Indiana |
| 51 | Zula Rice | 43 | Wife | — | Michigan |
| 52 | Helen Rice | 19 | Daughter | — | Michigan |
| 53 | Clarence (Jr) Rice | 16 | Son | — | Michigan |
| 54 | Steven Rice | 15 | Son | — | Michigan |
| 55 | Peter Luffers | 47 | Head | Painter | Michigan |
| 56 | Hermina Luffers | 39 | Wife | — | Michigan |
| 57 | Alma Luffers | 16 | Daughter | — | Michigan |
| 58 | Paul Luffers | 14 | Son | — | Michigan |
| 59 | Marvin Luffers | 12 | Son | — | Michigan |
| 60 | Grace Luffers | 4 | Daughter | — | Michigan |
| 61 | John Van Houten | 24 | Head | Farm Laborer | Michigan |
| 62 | Jean Van Houten | 26 | Wife | — | Michigan |
| 63 | Judith Ann Van Houten | 1 | Daughter | — | Michigan |
| 64 | Clifford R. Kollar | 33 | Head | Salesman | Michigan |
| 65 | Vera Kollar | 29 | Wife | — | Ohio |
| 66 | Robert Lee Kollar | 1 | Son | — | Michigan |
| 67 | Leonard Van Beukering | 34 | Head | Helper | Netherlands |
| 68 | Gertrude Van Beukering | 30 | Wife | — | Michigan |
| 69 | Lawrence Van Beukering | 4 | Son | — | Michigan |
| 70 | Lloyd Hickley | 34 | Head | Salesman | Michigan |
| 71 | Janet Hickley | 31 | Wife | Teacher | Michigan |
| 72 | Gust C. Vandam | 43 | Head | Brakeman | Michigan |
| 73 | Beulah Vandam | 41 | Wife | — | Michigan |
| 74 | Marion Vandam | 16 | Daughter | — | Michigan |
| 75 | Dorothy Vandam | 14 | Daughter | — | Michigan |
| 76 | Roy Vandam | 13 | Son | — | Michigan |
| 77 | Roger Vandam | 11 | Son | — | Michigan |
| 78 | Bert Draeger | 39 | Head | Machinist | Michigan |
| 79 | Elsie Draeger | 38 | Wife | — | Michigan |
| 80 | Jay Draeger | 18 | Son | Farm Laborer | Michigan |
Pedigree Summary
Lillian
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 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)