MC
Mary Cramer — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Rock Island, Illinois
Our Model Tree links this Mary Cramer across the 1920 and 1930 US Censuses in Rock Island, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1919), then head of a 8-person household.
Age 11
b. ~1919
Female
Daughter
Born: Illinois
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Rock Island, Illinois |
| Surname | Cramer |
| Given Name | Mary Jane |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Additional Details | |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Moline City |
| Est. Birth Year | ~1919 |
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 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Irena Cramer | Other | — | 39 | ~1891 |
| Gayle Cramer | Daughter | — | 5 | ~1925 |
| Thomas Cramer | Head | — | 29 | ~1901 |
| Mary Cramer | Daughter | — | 11 | ~1919 |
| Jack Cramer | Son | — | 19 | ~1911 |
| Lanette Cramer | Daughter | — | 9 | ~1921 |
| Betty Cramer | Daughter | — | 3 | ~1927 |
| Helen Cramer | Daughter | — | 17 | ~1913 |
Census Appearances
1920
Rock Island, …
Daughter, age 1
Rock Island, Illinois · implied b. ~1919 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cramer |
| Given Name | Mary Jane |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Rock Island, …
Daughter, age 11
Rock Island, Illinois · implied b. ~1919 — 8 household members
| Surname | Cramer |
| Given Name | Mary Jane |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| 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 Mary Cramer across 2 US Census years (1920 and 1930) in Rock Island, Illinois, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Cramer
Daughter · 1930 · age 11 · b. ~1919 · Illinois
★ You are viewing this record
Sibling
Jack Cramer
Sibling · 1930 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Cramer
Sibling · 1930 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Betty Cramer
Sibling · 1930 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gayle Cramer
Sibling · 1930 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lanette Cramer
Sibling · 1930 · age 9
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 — Rock Island, Illinois
Open full size
1930 US Federal Census — Rock Island, Illinois
Page Contents
50 people indexed on this census page (ia:1930:illinoiscensus00reel553:0106)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | John Rees | 7 | Son | None | Iowa |
| 52 | Arthur C Rees | 1 | Son | None | Iowa |
| 53 | Petrus A Ceder | 74 | Head | None | Sweden |
| 54 | Oscar Ceder | 48 | Son | Grinder | Sweden |
| 55 | Hulda Ceder | 32 | Daughter | Operator | Illinois |
| 56 | Ernest Ceder | 30 | Son | Chemical | Illinois |
| 57 | Ester Ceder | 28 | Daughter | Servant | Illinois |
| 58 | Axel Ceder | 24 | Son | Tool Maker | Illinois |
| 59 | A G Seaberg | 52 | Head | Signal System | Sweden |
| 60 | Hanna H Seaberg | 53 | Wife-H | None | Sweden |
| 61 | Ruth Seaberg | 28 | Daughter | Book Keeper | Illinois |
| 62 | Reubin Seaberg | 20 | Son | Salesman | Illinois |
| 63 | Ira Mayer | 56 | Head | Machinist | Kansas |
| 64 | Mable Mayer | 56 | Wife-H | None | Pennsylvania |
| 65 | Charles Lorch | 58 | Head | Merchant | Germany |
| 66 | Rose M Lorch | 48 | Wife-H | None | Illinois |
| 67 | Rose J Wegner | 46 | Head | None | Illinois |
| 68 | Ralph Wegner | 25 | Son | Repair Man | Missouri |
| 69 | Robert Wegner | 19 | Son | Messenger | Illinois |
| 70 | June Wegner | 7 | Daughter | None | Illinois |
| 71 | Al Wendt | 43 | Head | Salesman | Iowa |
| 72 | Minnie Wendt | 42 | Wife-H | None | Iowa |
| 73 | Harold W Wendt | 18 | Son | Core Maker | Iowa |
| 74 | Donald E Wendt | 14 | Son | None | Iowa |
| 75 | Joy Earline Wendt | 9 | Daughter | None | Illinois |
| 76 | Marloe June Wendt | 4 | Daughter | None | Illinois |
| 77 | George R Rathbun | 40 | Head | Contractor | South Dakota |
| 78 | Hilda M Rathbun | 33 | Wife-H | None | Iowa |
| 79 | Jessie Mckelvie | 63 | Head | None | Scotland |
| 80 | Alexander B Mckelvie | 36 | Son | Manager Shoe | Illinois |
| 81 | Margaret Mckelvie | 28 | Daughter | None | Illinois |
| 82 | F M Black | 32 | Head | Merchant | Indiana |
| 83 | Helen H Black | 33 | Wife-H | None | Illinois |
| 84 | C A Carlson | 71 | Head | None | Sweden |
| 85 | Hilma W Carlson | 69 | Wife-H | None | Sweden |
| 86 | Anna E Carlson | 42 | Daughter | Agent | Illinois |
| 87 | R A Streed | 42 | Head | Merchant | Sweden |
| 88 | Emily Streed | 48 | Wife-H | None | Sweden |
| 89 | Irene Streed | 21 | Daughter | Manager | Illinois |
| 90 | Warren R Streed | 21 | Son | None | Illinois |
| 91 | Thomas Cramer | 29 | Head | Blacksmith | Iowa |
| 92 | Irena M Cramer | 39 | Wife-H | None | Wyoming |
| 93 | Jack T Cramer | 19 | Son | Time Keeper | Illinois |
| 94 | Helen E Cramer | 17 | Daughter | None | Illinois |
| 95 | Mary Jane Cramer THIS PERSON | 11 | Daughter | None | Illinois |
| 96 | Lanette J Cramer | 9 | Daughter | None | Illinois |
| 97 | Gayle L Cramer | 5 | Daughter | None | Illinois |
| 98 | Betty Lou Cramer | 3 | Daughter | None | Illinois |
| 99 | Harry Anderson | 37 | Head | Tester Elec | Sweden |
| 100 | Mable Anderson | 38 | Wife-H | None | Iowa |
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)