MD
Marion Davis — 1930 US Census Record
Model Tree available1930 United States Federal Census · Cook, Illinois
Our Model Tree links this Marion Davis across the 1920, 1930 and 1940 US Censuses in Cook, Illinois (XGBoost, ~Confirmed), with identified parents Isbell & Agnes — first a daughter (b.~1917), then head of a 6-person household.
Age 13
b. ~1917
Female
Daughter
Born: Illinois
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Cook, Illinois |
| Surname | Davis |
| Given Name | Marion |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1917 |
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.
6 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Marion | Age | Birth yr |
|---|---|---|---|---|
| Marion Davis | Daughter | — | 13 | ~1917 |
| Lillian Davis | Daughter | — | 19 | ~1911 |
| Isbell Davis | Head | — | 48 | ~1882 |
| Marie Anderson | Other | — | 32 | ~1898 |
| Myron Davis | Son | — | 21 | ~1909 |
| Agnes Davis | Spouse | — | 45 | ~1885 |
Census Appearances
1920
Cook, Illinois
Daughter, age 3
Cook, Illinois · implied b. ~1917 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davis |
| Given Name | Marion |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Daughter, age 13
Cook, Illinois · implied b. ~1917 — 6 household members
| Surname | Davis |
| Given Name | Marion |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Spouse, age 24
Cook-County, Illinois · implied b. ~1916 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davis |
| Given Name | Miriam |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| 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 Marion Davis across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Isbell Davis (~0.92 confidence) and mother Agnes Davis (~0.92 confidence) and father James Davis (~0.92 confidence) and mother Crystal Davis (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Isbell Davis
b. ~1882
Source father
● Household
· direct · ~0.92
Mother
Agnes Davis
b. ~1885
Source mother
● Household
· direct · ~0.92
Father
James Davis
b. ~1890
Source father
● Household
· direct · ~0.92
Mother
Crystal Davis
b. ~1892
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Marion Davis
Daughter · 1930 · age 13 · b. ~1917 · Illinois
★ You are viewing this record
Sibling
Lillian Davis
Sibling · 1930 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Myron Davis
Sibling · 1930 · age 21
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 — Cook, Illinois
Open full size
1930 US Federal Census — Cook, Illinois
Page Contents
50 people indexed on this census page (ia:1930:illinoiscensus00reel422:0098)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Robert R. Varnum | 38 | Head | Secretary | South Dakota |
| 52 | Bess L. Varnum | 37 | Wife | — | Iowa |
| 53 | Betty Lou Varnum | 10 | Daughter | — | Minnesota |
| 54 | Robert R. Jr. Varnum | 7 | Son | — | Minnesota |
| 55 | Patricia Anne Varnum | 2 | Daughter | — | Illinois |
| 56 | Clara Helms | 20 | Lodger | — | Wisconsin |
| 57 | Maurice (Abe) Hooley | 36 | Head | Secretary | Illinois |
| 58 | Beryl (Abe) Hooley | 35 | Wife | — | Illinois |
| 59 | John (Abe) Hooley | 4 | Son | — | Illinois |
| 60 | Estelle Mcmillan | 71 | Lodger | — | Michigan |
| 61 | Walter L. Johnson | 66 | Head | Teacher | Indiana |
| 62 | Alice Johnson | 60 | Wife | — | Illinois |
| 63 | Harry Kadinov | 51 | Head | Proprietor | Lithuania |
| 64 | Esther Kadinov | 47 | Wife | — | Poland |
| 65 | Bernice Kadinov | 25 | Daughter | Saleslady | Illinois |
| 66 | Hyman Kadinov | 23 | Son | Salesman | Illinois |
| 67 | Alma Kadinov | 19 | Daughter | Saleslady | Illinois |
| 68 | Maurice Magnus | 54 | Head | Proprietor | Pennsylvania |
| 69 | Myra A. Magnus | 39 | Wife | — | Colorado |
| 70 | Jean Magnus | 18 | Daughter | — | Wisconsin |
| 71 | John L. Magnus | 13 | Son | — | Wisconsin |
| 72 | Marie Blomquist | 22 | Servant | Servant | Sweden |
| 73 | Nathan Liff | 56 | Head | Proprietor | Lithuania |
| 74 | Dora Liff | 55 | Wife | — | Lithuania |
| 75 | Sadie Liff | 29 | Daughter | Saleslady | Lithuania |
| 76 | Lillian Liff | 27 | Daughter | Teacher | Lithuania |
| 77 | Ida Liff | 26 | Daughter | — | Lithuania |
| 78 | Pearl Liff | 24 | Daughter | Stenographer | Indiana |
| 79 | Harry Liff | 18 | Son | Commercial Boy | Indiana |
| 80 | Isbell Davis | 48 | Head | Proprietor | Russia |
| 81 | Agnes Davis | 45 | Wife | — | Illinois |
| 82 | Myron Davis | 21 | Son | — | Illinois |
| 83 | Lillian Davis | 19 | Daughter | — | Illinois |
| 84 | Marion Davis THIS PERSON | 13 | Daughter | — | Illinois |
| 85 | Marie Anderson | 32 | Servant | Servant | Sweden |
| 86 | Ralph W. Hancock | 35 | Head | — | Illinois |
| 87 | Anna Hancock | 26 | Wife | Servant | Czechoslovakia |
| 88 | Blank Blank | None | Blank | Blank | Blank |
| 89 | Blank Blank | None | Blank | Blank | Blank |
| 90 | Meyer Franklin | 64 | Head | — | Poland |
| 91 | Rachel Franklin | 68 | Wife | — | Poland |
| 92 | Pearl Franklin | 44 | Daughter | Teacher | Poland |
| 93 | Lillian H. Franklin | 41 | Daughter | Teacher | Poland |
| 94 | Eleanor E. Libby | 56 | Head | — | Wisconsin |
| 95 | Marion E. Libby | 32 | Daughter | Asst Manager | Illinois |
| 96 | Mabel Struve | 50 | Sister | Manager | Illinois |
| 97 | Eleanor Foster | 73 | Head | — | Ohio |
| 98 | Roland L. Foster | 48 | Son | Broker | Illinois |
| 99 | Zillah L. Foster | 47 | Daughter-in-law | — | Illinois |
| 100 | Mary E. Foster | 22 | Granddaughter | Teacher | Illinois |
Pedigree Summary
Marion + 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)