MH
Mary Hendricks — 1920 US Census Record
Linked across censuses1920 United States Federal Census · St Clair, Illinois
Our Model Tree links this Mary Hendricks across the 1920 and 1930 US Censuses in St Clair, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1917), then head of a 9-person household.
Age 3
b. ~1917
Female
Daughter
Born: Alabama
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | St Clair, Illinois |
| Surname | Hendricks |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | Black |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Alabama |
| Father's Birthplace | Alabama |
| Mother's Birthplace | Mississippi |
| Additional Details | |
| Occupation | none |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
| Township / Ward | City Of East St Louis |
| 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.
9 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Frederick Hendricks | Son | — | 5 | ~1915 |
| Leo Hendricks | Son | — | 6 | ~1914 |
| Annie Hendricks | Spouse | — | 29 | ~1891 |
| Peter Hendricks | Head | — | 33 | ~1887 |
| Mary Hendricks | Daughter | — | 3 | ~1917 |
| Velma Hendricks | Son | — | 1 | ~1919 |
| Peter Hendricks | Son | — | 11 | ~1909 |
| C Williams | Other | — | 27 | ~1893 |
| Samuel Henry | Other | — | 27 | ~1893 |
Census Appearances
1920
St Clair, …
Daughter, age 3
St Clair, Illinois · implied b. ~1917 — 9 household members
| Surname | Hendricks |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | Black |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Alabama |
| Father's Birthplace | Alabama |
| Mother's Birthplace | Mississippi |
| Occupation | none |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
1930
St Clair, …
Daughter, age 13
St Clair, Illinois · implied b. ~1917 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hendrix |
| Given Name | Mary A. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Alabama |
| Father's Birthplace | Alabama |
| Mother's Birthplace | Mississippi |
| Can Read/Write | Yes |
| Birth State | Alabama |
| Birth Country | United States |
| Birthplace (normalized) | alabama |
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 Hendricks across 2 US Census years (1920 and 1930) in St Clair, Illinois, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Hendricks
Daughter · 1920 · age 3 · b. ~1917 · Illinois
★ You are viewing this record
Sibling
Velma Hendricks
Sibling · 1920 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frederick Hendricks
Sibling · 1920 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Peter Hendricks
Sibling · 1920 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leo Hendricks
Sibling · 1920 · age 6
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
1920 US Federal Census — St Clair, Illinois
Open full size
1920 US Federal Census — St Clair, Illinois
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu404unit:0908)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Dudley Randall | 5 | son | None | Washington D.C. |
| 52 | Esther D Randall | 3 | daughter | None | Maryland |
| 53 | Chas T Nash | 29 | head | Undertaker | Ohio |
| 54 | Emma Nash | 22 | wife | None | Illinois |
| 55 | Claudia Nash | 3 | daughter | None | Illinois |
| 56 | Baby Nash | 1 | daughter | None | Illinois |
| 57 | John Carroll | 35 | head | Carpenter | N. Carolina |
| 58 | Carrie Carroll | 29 | wife | None | Georgia |
| 59 | Fred Carroll | 16 | son | Laborer | Georgia |
| 60 | John Jefferson | 58 | head | Helper | Kentucky |
| 61 | Harriett Jefferson | 58 | wife | Laundress | Tennessee |
| 62 | Glover Joseph Jefferson | 14 | grandson | None | Illinois |
| 63 | Robert Carter | 5 | grandson | None | Illinois |
| 64 | Ollie Jackson | 40 | head | Laborer | Florida |
| 65 | Gussie Jackson | 26 | wife | None | Kentucky |
| 66 | Irene Jackson | 13 | daughter | None | Kentucky |
| 67 | Ollie Jr Jackson | 10 | son | None | Illinois |
| 68 | Peter Coy | 23 | head | Butcher | Tennessee |
| 69 | Mary M Coy | 20 | wife | None | Illinois |
| 70 | Henry Coy | 1 | son | None | Illinois |
| 71 | Martha Locket | 44 | mother-in-law | Laundress | Missouri |
| 72 | Pearl Smith | 16 | sister-in-law | None | Illinois |
| 73 | Isaac Davis | 21 | head | Butcher | Illinois |
| 74 | Emmarine Davis | 19 | wife | None | Kentucky |
| 75 | Helen E. Davis | 0 | daughter | None | Illinois |
| 76 | Evelyn Bishop | 13 | sister-in-law | None | Kentucky |
| 77 | James Herrell | 22 | brother | Laborer | Kentucky |
| 78 | Jeanette Herrell | 6 | niece | None | Illinois |
| 79 | Edward Herrell | 2 | nephew | None | Illinois |
| 80 | Peter Hendricks | 33 | head | Laborer | Alabama |
| 81 | Annie Hendricks | 29 | wife | None | Mississippi |
| 82 | Peter Jr Hendricks | 11 | son | None | Alabama |
| 83 | Leo Hendricks | 6 | son | None | Alabama |
| 84 | Frederick Hendricks | 5 | son | None | Alabama |
| 85 | Mary Hendricks THIS PERSON | 3 | daughter | None | Alabama |
| 86 | Velma Hendricks | 1 | son | None | Illinois |
| 87 | C. E. Williams | 27 | brother-in-law | Laborer | Mississippi |
| 88 | Samuel Henry | 27 | cousin | Laborer | Mississippi |
| 89 | Leroy Houston | 29 | head | Butcher | Mississippi |
| 90 | Annie Houston | 27 | wife | None | Missouri |
| 91 | Elsie Brown | 67 | mother | None | S. Carolina |
| 92 | Calvin Single | 52 | head | Janitor | Mississippi |
| 93 | Louis Holmes | 42 | head | Laborer | Mississippi |
| 94 | Arie Holmes | 39 | wife | None | Mississippi |
| 95 | Robert Mason | 44 | head | Laborer | Mississippi |
| 96 | Essie Mason | 46 | wife | None | Mississippi |
| 97 | John H Smith | 12 | grandson | None | Mississippi |
| 98 | Thelma G Ellis | 11 | granddaughter | None | Mississippi |
| 99 | Giles Griffin | 30 | head | Laborer | Mississippi |
| 100 | Ida Griffin | 29 | wife | None | Missouri |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1920 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)