JC
John Conrad — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Madison, Illinois
Our Model Tree links this John Conrad across the 1920 and 1930 US Censuses in Madison, Illinois (XGBoost, ~Confirmed) — first a son (b.~1913), then head of a 9-person household.
Age 17
b. ~1913
Male
Son
Born: Illinois
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Madison, Illinois |
| Surname | Conrad |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Additional Details | |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Marine Township |
| 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.
9 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Clarence Horry | Other | — | 27 | ~1903 |
| John Conrad | Son | — | 17 | ~1913 |
| Harold Conrad | Son | — | 17 | ~1913 |
| Stella Conrad | Daughter | — | 19 | ~1911 |
| Blanche Conrad | Daughter | — | 18 | ~1912 |
| Virginia Conrad | Daughter | — | 1 | ~1929 |
| William Conrad | Head | — | 54 | ~1876 |
| Edna Conrad | Daughter | — | 24 | ~1906 |
| Lena Conrad | Spouse | — | 54 | ~1876 |
Census Appearances
1920
Madison, Illinois
Son, age 6
Madison, Illinois · implied b. ~1914 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Conrad |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read | No |
| Can Write | No |
| Speaks English | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Madison, Illinois
Son, age 17
Madison, Illinois · implied b. ~1913 — 9 household members
| Surname | Conrad |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Can Read/Write | Yes |
| 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 John Conrad across 2 US Census years (1920 and 1930) in Madison, Illinois, using XGBoost record linkage.
Show:
This person
Anchor record
John Conrad
Son · 1930 · age 17 · b. ~1913 · Illinois
★ You are viewing this record
Sibling
Virginia Conrad
Sibling · 1930 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Harold Conrad
Sibling · 1930 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Stella Conrad
Sibling · 1930 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Blanche Conrad
Sibling · 1930 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edna Conrad
Sibling · 1930 · age 24
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 — Madison, Illinois
Open full size
1930 US Federal Census — Madison, Illinois
Page Contents
50 people indexed on this census page (ia:1930:illinoiscensus00reel541:0414)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | John Donnelly | 16 | Son | None | Illinois |
| 52 | William Donnelly | 14 | Son | None | Illinois |
| 53 | Priscilla Donnelly | 11 | Daughter | None | Illinois |
| 54 | Virgil Donnelly | 8 | Son | None | Illinois |
| 55 | Spurgeon Donnelly | 8 | Son | None | Illinois |
| 56 | James Donnelly | 6 | Son | None | Illinois |
| 57 | Jacob J. Iberg | 57 | Head | Farmer | Illinois |
| 58 | Hermina Iberg | 39 | Wife | None | Illinois |
| 59 | Morris Iberg | 19 | Son | Laborer | Illinois |
| 60 | Fred Grimm | 69 | Head | Farmer | Germany |
| 61 | Louise Grimm | 63 | Wife | None | Germany |
| 62 | Agnes Donnelly | 15 | Granddaughter | None | Illinois |
| 63 | Ernest E. Carter | 34 | Head | Farmer | Illinois |
| 64 | Lillie M. Carter | 32 | Wife | None | Illinois |
| 65 | Opal L. Carter | 11 | Daughter | None | Illinois |
| 66 | Marcella J. Carter | 9 | Daughter | None | Illinois |
| 67 | Leo F. Carter | 8 | Son | None | Illinois |
| 68 | Ed Carter | 53 | Head | Farmer | Ohio |
| 69 | Ida Carter | 43 | Wife | None | Switzerland |
| 70 | Ruby Carter | 15 | Daughter | None | Illinois |
| 71 | Isaac L. Carter | 47 | Head | Farmer | Ohio |
| 72 | Catherine M. Carter | 44 | Wife | None | Illinois |
| 73 | Gladys Carter | 16 | Daughter | None | Illinois |
| 74 | Edith Carter | 14 | Daughter | None | Illinois |
| 75 | James Runnert | 22 | Hired hand | Laborer | Illinois |
| 76 | William Conrad | 54 | Head | Farmer | Germany |
| 77 | Lena Conrad | 54 | Wife | None | Illinois |
| 78 | Edna Conrad | 24 | Daughter | None | Illinois |
| 79 | Stella Conrad | 19 | Daughter | None | Illinois |
| 80 | Blanche Conrad | 18 | Daughter | None | Illinois |
| 81 | John Conrad THIS PERSON | 17 | Son | None | Illinois |
| 82 | Harold Conrad | 17 | Son | None | Illinois |
| 83 | Virginia Conrad | 1 | Daughter | None | Illinois |
| 84 | Clarence Horry | 27 | Hired hand | Laborer | Germany |
| 85 | Fred R. Wildhaber | 33 | Head | Farmer | Illinois |
| 86 | Regina Wildhaber | 34 | Wife | None | Illinois |
| 87 | Marion Wildhaber | 8 | Daughter | None | Illinois |
| 88 | Alvin Wildhaber | 5 | Son | None | Illinois |
| 89 | Henry G. Maedge | 38 | Head | Farmer | Germany |
| 90 | Mathilda R. Maedge | 35 | Wife | None | Illinois |
| 91 | Robert H. Maedge | 16 | Son | None | Illinois |
| 92 | Bessanell Maedge | 12 | Son | None | Illinois |
| 93 | Ben Maedge | 10 | Son | None | Illinois |
| 94 | Morris Quist | 54 | Head | Farmer | Germany |
| 95 | Freddie Quist | 45 | Brother | Farmer | Germany |
| 96 | Dora Quist | 87 | Mother | None | Germany |
| 97 | Daniel Horn | 34 | Head | Farmer | Germany |
| 98 | Minnie E. Horn | 27 | Wife | None | Illinois |
| 99 | Cecelia G. Horn | 6 | Daughter | None | Illinois |
| 100 | Kenneth P. Horn | 4 | Son | None | Illinois |
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)