ES
Eugene Sullivan — 1930 US Census Record
Model Tree available1930 United States Federal Census · Cook, Illinois
Our Model Tree links this Eugene Sullivan across the 1910, 1920 and 1930 US Censuses in Cook, Illinois (XGBoost, ~Confirmed), with identified parents Eugene & Cornelius — first a son (b.~1909), then head of a 6-person household.
Age 21
b. ~1909
Male
Son
Born: Illinois
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Cook, Illinois |
| Surname | Sullivan |
| Given Name | Eugene |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Illinois |
| Additional Details | |
| Occupation | Clerk |
| Industry | Pullman Co |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Clerk |
| Township / Ward | Chicago City |
| 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.
6 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Eugene | Age | Birth yr |
|---|---|---|---|---|
| Cornelius Sullivan | Son | — | 17 | ~1913 |
| Nellie Sullivan | Spouse | — | 50 | ~1880 |
| Eugene Sullivan | Son | — | 21 | ~1909 |
| Mary Sullivan | Daughter | — | 8 | ~1922 |
| James Sullivan | Son | — | 14 | ~1916 |
| Cornelius Sullivan | Head | — | 53 | ~1877 |
Census Appearances
1910
Cook, Illinois
Son, age 1
Cook, Illinois · implied b. ~1909 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Eugene A Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1920
Cook, Illinois
Son, age 11
Cook, Illinois · implied b. ~1909 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Eugene |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 21
Cook, Illinois · implied b. ~1909 — 6 household members
| Surname | Sullivan |
| Given Name | Eugene |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Illinois |
| Occupation | Clerk |
| Industry | Pullman Co |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| 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 Eugene Sullivan across 3 US Census years (1910, 1920 and 1930) in Cook, Illinois, using XGBoost record linkage. Identified parents: father Eugene Sullivan (~0.92 confidence) and father Cornelius Sullivan (~0.92 confidence) and mother Theresa Sullivan (~0.92 confidence) and mother Nellie Sullivan (~0.92 confidence) and mother Nellie Sullivan (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Eugene Sullivan
b. ~1867
Source father
● Household
· direct · ~0.92
Father
Cornelius Sullivan
b. ~1877
Source father
● Household
· direct · ~0.92
Mother
Theresa Sullivan
b. ~1877
Source mother
● Household
· direct · ~0.92
Mother
Nellie Sullivan
b. ~1880
Source mother
● Household
· direct · ~0.92
Mother
Nellie Sullivan
b. ~1880
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Eugene Sullivan
Son · 1930 · age 21 · b. ~1909 · Illinois
★ You are viewing this record
Sibling
Mary Sullivan
Sibling · 1930 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Cornelius Sullivan
Sibling · 1930 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Sullivan
Sibling · 1930 · age 14
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:illinoiscensus00reel437:0487)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Cornelius Sullivan | 53 | Head | Postal Clerk | Ireland |
| 52 | Nellie Sullivan | 50 | Wife | — | Illinois |
| 53 | Eugene Sullivan THIS PERSON | 21 | Son | Clerk | Illinois |
| 54 | Cornelius Sullivan | 17 | Son | Clerk | Illinois |
| 55 | James Sullivan | 14 | Son | — | Illinois |
| 56 | Mary Sullivan | 8 | Daughter | — | Illinois |
| 57 | Elizabeth Cavanaugh | 40 | Head | — | Illinois |
| 58 | Lillian Cavanaugh | 21 | Daughter | Stenographer | Illinois |
| 59 | Charles Cavanaugh | 19 | Son | Inspector | Illinois |
| 60 | George Cavanaugh | 18 | Son | Trucker | Illinois |
| 61 | Louis Maljeski | 60 | Brother | — | New Jersey |
| 62 | Adam Vrobel | 44 | Head | Yard Shipping Clerk | Poland |
| 63 | Anna Vrobel | 36 | Wife | — | Illinois |
| 64 | Sophie Vrobel | 16 | Daughter | — | Illinois |
| 65 | Lucille Vrobel | 15 | Daughter | Typist | Illinois |
| 66 | Edmund Vrobel | 13 | Son | — | Illinois |
| 67 | Wanda Vrobel | 7 | Daughter | — | Illinois |
| 68 | John Moore | 50 | Head | Butcher | Ireland |
| 69 | Bridget Moore | 50 | Wife | — | Ireland |
| 70 | Michael Moore | 27 | Son | Electrician | Illinois |
| 71 | John Moore | 25 | Son | Cattle Driver | Illinois |
| 72 | James Moore | 23 | Son | — | Illinois |
| 73 | Thomas Moore | 21 | Son | Cattle Driver | Illinois |
| 74 | Marie Moore | 19 | Daughter | Cashier | Illinois |
| 75 | Jenny Patten | 28 | Nephew | Laborer | Illinois |
| 76 | Vincent Slonicki | 42 | Head | Crane Oper | Poland |
| 77 | Helen Slonicki | 39 | Wife | — | Poland |
| 78 | Eleanor Slonicki | 19 | Daughter | — | Illinois |
| 79 | Hattie Slonicki | 14 | Daughter | — | Illinois |
| 80 | Henry Slonicki | 11 | Son | — | Illinois |
| 81 | Frank Mrazak | 40 | Head | Grave Digging | Poland |
| 82 | Anna Mrazak | 35 | Wife | — | Poland |
| 83 | Eugene Mrazak | 13 | Son | — | Illinois |
| 84 | Florence Mrazak | 11 | Daughter | — | Illinois |
| 85 | Sigismund Mrazak | 3 | Son | — | Illinois |
| 86 | Joseph Krol | 39 | Head | Real Estate | Poland |
| 87 | Lottie Krol | 30 | Wife | — | Illinois |
| 88 | Florence Krol | 11 | Daughter | — | Illinois |
| 89 | Frank Krol | 8 | Son | — | Illinois |
| 90 | Henry Krol | 2 | Son | — | Illinois |
| 91 | Joseph Goryl | 44 | Head | Carpenter | Poland |
| 92 | Anna Goryl | 48 | Wife | — | Poland |
| 93 | Stephen Goryl | 19 | Son | Laborer | Illinois |
| 94 | Andrew Goryl | 17 | Son | Clerk | Illinois |
| 95 | John Goryl | 13 | Son | — | Illinois |
| 96 | Mary Goryl | 11 | Daughter | — | Illinois |
| 97 | Walter Piechalak | 43 | Head | Steel Worker | Poland |
| 98 | Mary Piechalak | 40 | Wife | — | Poland |
| 99 | Sophie Piechalak | 13 | Daughter | — | Illinois |
| 100 | Helen Piechalak | 11 | Daughter | — | Illinois |
Pedigree Summary
Eugene + 3 siblings
Gen 1 · 5 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)