MJ
Mary John — 1920 US Census Record
Model Tree available1920 United States Federal Census · Cook, Illinois
Our Model Tree links this Mary John across the 1920, 1930 and 1940 US Censuses in Cook, Illinois (XGBoost, ~Confirmed), with identified parents Julia & Arthur — first a daughter (b.~1913), then head of a 8-person household.
Age 7
b. ~1913
Female
Daughter
Born: Illinois
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | Cook, Illinois |
| Surname | John |
| Given Name | Mary Ann |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Additional Details | |
| Occupation | In school |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | In School |
| Township / Ward | Part Of 33 |
| Est. Birth Year | ~1913 |
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 1920 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary John | Daughter | — | 7 | ~1913 |
| Jens Thompson | Other | — | 26 | ~1894 |
| John John | Head | — | 39 | ~1881 |
| Florence Rudy | Other | — | 27 | ~1893 |
| Michael John | Son | — | 9 | ~1911 |
| Joseph John | Son | — | 11 | ~1909 |
| Ellen John | Daughter | — | 5 | ~1915 |
| Mary John | Spouse | — | 38 | ~1882 |
Census Appearances
1920
Cook, Illinois
Daughter, age 7
Cook, Illinois · implied b. ~1913 — 8 household members
| Surname | John |
| Given Name | Mary Ann |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | In school |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Daughter, age 17
Cook, Illinois · implied b. ~1913 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | John |
| Given Name | Marguerite |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| 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 28
Cook-County, Illinois · implied b. ~1912 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | John |
| Given Name | Margret |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago city |
| 1935 Residence (County) | Cook |
| Income (1939) | 0 |
| Highest Grade | Hs 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 Mary John across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Julia John (~0.92 confidence) and father Arthur John (~0.92 confidence) and father John John (~0.92 confidence) and mother Mary John (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Julia John
b. ~1878
Source mother
● Household
· direct · ~0.92
Father
Arthur John
b. ~1879
Source father
● Household
· direct · ~0.92
Father
John John
b. ~1881
Source father
● Household
· direct · ~0.92
Mother
Mary John
b. ~1882
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary John
Daughter · 1920 · age 7 · b. ~1913 · Illinois
★ You are viewing this record
Sibling
Michael John
Sibling · 1920 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ellen John
Sibling · 1920 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph John
Sibling · 1920 · age 11
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 — Cook, Illinois
Open full size
1920 US Federal Census — Cook, Illinois
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu357unit:0225)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Gustave Raymond | 37 | Brother-in-law | — | New York |
| 52 | Patrick Malloy | 52 | Head | Blacksmith | Scotland |
| 53 | Laura Malloy | 51 | Wife | — | Illinois |
| 54 | Arthur Malloy | 23 | Son | Mechanic | Illinois |
| 55 | Victor Malloy | 21 | Son | Clerk | Illinois |
| 56 | James Malloy | 18 | Daughter | In School | Illinois |
| 57 | Laura Malloy | 16 | Daughter | In School | Illinois |
| 58 | Edward Malloy | 14 | Son | In School | Illinois |
| 59 | George Malloy | 12 | Son | In School | Illinois |
| 60 | Blair Clemons | 52 | Head | — | Ireland |
| 61 | Alice Clemons | 31 | Daughter | Clerk | Illinois |
| 62 | Robert Clemons | 11 | Grandson | Stock Boy | Illinois |
| 63 | Joseph Clemons | 3 | Grandson | — | Illinois |
| 64 | Mary Olsen | 40 | Daughter | — | Illinois |
| 65 | Margaret Olsen | 21 | Granddaughter | Technician | Illinois |
| 66 | Ellen Olsen | 19 | Granddaughter | Stenographer | Illinois |
| 67 | Edward Olsen | 17 | Grandson | In School | Illinois |
| 68 | John W Duppie | 27 | Head | Lineman | Illinois |
| 69 | Mary Duppie | 27 | Wife | — | Illinois |
| 70 | Mary C Duppie | 3 | Daughter | — | Illinois |
| 71 | Joseph J Duppie | 1 | Son | — | Illinois |
| 72 | Robert Parett | 68 | Head | Fire Insurance | New York |
| 73 | Mary E Parett | 68 | Wife | — | Missouri |
| 74 | Lester Schaefer | 25 | Nephew | Undertaker | Illinois |
| 75 | Margaret Ford | 44 | Head | — | Luxembourg |
| 76 | Leo Ford | 23 | Son | Water Clerk | Illinois |
| 77 | Gertrude Ford | 20 | Daughter | Dict Operator | Illinois |
| 78 | Clarence Ford | 14 | Son | In School | Illinois |
| 79 | Jesse Munson | 46 | Head | Engineer Civil | Minnesota |
| 80 | Emma Munson | 46 | Wife | — | Wisconsin |
| 81 | Dorothy Munson | 13 | Daughter | In School | Illinois |
| 82 | Marian Munson | 11 | Daughter | In School | Illinois |
| 83 | Fred J Belt | 33 | Roomer | Manager | Iowa |
| 84 | Mabel Belt | 37 | Roomer | — | Illinois |
| 85 | Bernice Belt | 12 | Roomer | — | Illinois |
| 86 | John A Hyman | 27 | Head | Salesman | Minnesota |
| 87 | Mary J Hyman | 57 | Mother | — | Illinois |
| 88 | Elizabeth L Hyman | 19 | Sister | Clerk | Illinois |
| 89 | Myrtle D Hogue | 24 | Boarder | Stenographer | Illinois |
| 90 | Robert Sahrow | 39 | Head | Commercial Traveler | Iowa |
| 91 | Anna E Sahrow | 35 | Wife | — | Illinois |
| 92 | George Jr Macgrath | 50 | Roomer | Actor | England |
| 93 | John C John | 39 | Head | Leather Merchant | Illinois |
| 94 | Mary A John | 38 | Wife | — | Illinois |
| 95 | Joseph E John | 11 | Son | In School | Illinois |
| 96 | Michael J John | 9 | Son | In School | Illinois |
| 97 | Mary Ann John THIS PERSON | 7 | Daughter | In School | Illinois |
| 98 | Ellen Marie John | 5 | Daughter | — | Illinois |
| 99 | Jens Thompson | 26 | Roomer | Color Printing | Illinois |
| 100 | Florence H Rudy | 27 | Roomer | Milliner | Minnesota |
Pedigree Summary
Mary + 3 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 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)