IN
Irene Nelson — 1930 US Census Record
Model Tree available1930 United States Federal Census · Black Hawk, Iowa
Our Model Tree links this Irene Nelson across the 1920, 1930 and 1940 US Censuses in Black Hawk, Iowa (XGBoost, ~Confirmed), with identified parents John & John — first a daughter (b.~1918), then head of a 4-person household.
Age 12
b. ~1918
Female
Daughter
Born: Iowa
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Black Hawk, Iowa |
| Surname | Nelson |
| Given Name | Irene |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Iowa |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Cedar Falls City |
| Est. Birth Year | ~1918 |
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.
4 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Irene | Age | Birth yr |
|---|---|---|---|---|
| John Nelson | Head | — | 41 | ~1889 |
| Ethel Nelson | Daughter | — | 9 | ~1921 |
| Irene Nelson | Daughter | — | 12 | ~1918 |
| Mary Nelson | Other | — | 39 | ~1891 |
Census Appearances
1920
Black Hawk, …
Daughter, age
Black Hawk, Iowa · implied b. ~1920 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Irene |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Black Hawk, …
Daughter, age 12
Black Hawk, Iowa · implied b. ~1918 — 4 household members
| Surname | Nelson |
| Given Name | Irene |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Black-Hawk-County, Iowa
Spouse, age 22
Black-Hawk-County, Iowa · implied b. ~1918 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nielsen |
| Given Name | Irene H. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Cedar Falls City |
| 1935 Residence (County) | Black Hawk |
| Income (1939) | 0 |
| Highest Grade | C 1 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 Irene Nelson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Nelson (~0.92 confidence) and father John Nelson (~0.92 confidence) and mother Mary Nelson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Nelson
b. ~1889
Source father
● Household
· direct · ~0.92
Father
John Nelson
b. ~1887
Source father
● Household
· direct · ~0.92
Mother
Mary Nelson
b. ~1891
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Irene Nelson
Daughter · 1930 · age 12 · b. ~1918 · Iowa
★ You are viewing this record
Sibling
Ethel Nelson
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 — Black Hawk, Iowa
Open full size
1930 US Federal Census — Black Hawk, Iowa
Page Contents
50 people indexed on this census page (ia:1930:iowacensus00reel642:0234)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Charles W. Olsen | 48 | Head | Purchasing Agent | Iowa |
| 2 | Inga M. Olsen | 47 | Wife-H | — | Denmark |
| 3 | Verna A. Olsen | 13 | Daughter | — | Iowa |
| 4 | Maria Knudsen | 66 | Head | — | Denmark |
| 5 | Leo O. Knudsen | 29 | Son | Inspector | Iowa |
| 6 | Edna E. Knudsen | 26 | Daughter | Bookkeeper | Iowa |
| 7 | Hans C. Hansen | 48 | Head | Carpenter | Denmark |
| 8 | Petra A. Hansen | 37 | Wife-H | — | Denmark |
| 9 | Mary H. Hansen | 11 | Daughter | — | Iowa |
| 10 | Margaret N. Hansen | 6 | Daughter | — | Iowa |
| 11 | Marie Lund | 71 | Head | — | Denmark |
| 12 | Ray J. Spence | 31 | Head | Salesman | Iowa |
| 13 | Della M. Spence | 28 | Wife-H | — | Iowa |
| 14 | Raymond F. Spence | 7 | Son | — | Iowa |
| 15 | Dorothy M. Spence | 5 | Daughter | — | Iowa |
| 16 | Kathleen G. Spence | 3 | Daughter | — | Iowa |
| 17 | Donald R. Spence | 1 | Son | — | Iowa |
| 18 | Edward Spence | 25 | Brother | Salesman | Iowa |
| 19 | Ingeborg N. Dall | 74 | Head | — | Denmark |
| 20 | James O. Johnson | 66 | Head | — | Wisconsin |
| 21 | Johanna H. Johnson | 63 | Wife-H | — | Denmark |
| 22 | Lillian Johnson | 21 | Daughter | Nurse | Wisconsin |
| 23 | John B. Fohn | 60 | Head | — | Iowa |
| 24 | Caroline Fohn | 63 | Wife-H | — | Iowa |
| 25 | Margaret C. Fohn | 23 | Daughter | Stenographer | Iowa |
| 26 | William H. Haddock | 50 | Head | Teacher | Ohio |
| 27 | Mary B. Haddock | 40 | Wife-H | — | Iowa |
| 28 | Richard G. Haddock | 12 | Son | — | Maryland |
| 29 | Robert R. Haddock | 7 | Son | — | Ohio |
| 30 | John W. Haddock | 3 | Son | — | Ohio |
| 31 | Sarah A. Barnum | 69 | Mother-in-law | — | Illinois |
| 32 | Chris Jensen | 54 | Head | Salesman | Denmark |
| 33 | Thyra Jensen | 43 | Wife-H | — | Iowa |
| 34 | Harold Jensen | 21 | Son | — | Iowa |
| 35 | Earnest Jensen | 14 | Son | — | Iowa |
| 36 | John A. Nelson | 41 | Head | Truck Driver | Denmark |
| 37 | Mary H. Nelson | 39 | Wife-H | — | Iowa |
| 38 | Irene Nelson THIS PERSON | 12 | Daughter | — | Iowa |
| 39 | Ethel M. Nelson | 9 | Daughter | — | Iowa |
| 40 | Thomas E. Williams | 49 | Head | Salesman | Ohio |
| 41 | Bertha Williams | 50 | Wife-H | — | Ohio |
| 42 | Virginia Williams | 20 | Daughter | — | Iowa |
| 43 | Elva G. Williams | 16 | Daughter | — | Iowa |
| 44 | John S. Latta | 59 | Head | Merchant | Iowa |
| 45 | Mabel N. Latta | 58 | Wife-H | — | Illinois |
| 46 | Ruth Latta | 17 | Daughter | — | Iowa |
| 47 | John S. Latta | 22 | Head | Merchant | Iowa |
| 48 | Mae Latta | 21 | Wife-H | — | Iowa |
| 49 | Donald Baxter | 23 | Head | Merchant | Iowa |
| 50 | Christine Baxter | 23 | Wife-H | — | Iowa |
Pedigree Summary
Irene + 1 sibling
Gen 1 · 3 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)