RJ
Ralph Johnson — 1930 US Census Record
Model Tree available1930 United States Federal Census · Des Moines, Iowa
Our Model Tree links this Ralph Johnson across the 1910, 1920 and 1930 US Censuses in Des Moines, Iowa (XGBoost, ~Confirmed), with identified parents C & Charles — first a son (b.~1908), then head of a 7-person household.
Age 22
b. ~1908
Male
Son
Born: Iowa
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Des Moines, Iowa |
| Surname | Johnson |
| Given Name | Ralph A. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Additional Details | |
| Occupation | Storekeeper |
| Industry | R. R. Supply Dept. |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Storekeeper |
| Township / Ward | West Burlington Town |
| Est. Birth Year | ~1908 |
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.
7 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Ralph | Age | Birth yr |
|---|---|---|---|---|
| Eleanor Johnson | Daughter | — | 32 | ~1898 |
| Virginia Johnson | Daughter | — | 13 | ~1917 |
| Selma Johnson | Daughter | — | 20 | ~1910 |
| Charles Johnson | Head | — | 60 | ~1870 |
| Amanda Johnson | Other | — | 58 | ~1872 |
| Gilbert Johnson | Son | — | 11 | ~1919 |
| Ralph Johnson | Son | — | 22 | ~1908 |
Census Appearances
1910
Des Moines, …
Son, age 3
Des Moines, Iowa · implied b. ~1907 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Ralph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1920
Des Moines, …
Son, age 13
Des Moines, Iowa · implied b. ~1907 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Ralph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Des Moines, …
Son, age 22
Des Moines, Iowa · implied b. ~1908 — 7 household members
| Surname | Johnson |
| Given Name | Ralph A. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Storekeeper |
| Industry | R. R. Supply Dept. |
| Class of Worker | W |
| Can Read/Write | Yes |
| 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 Ralph Johnson across 3 US Census years (1910, 1920 and 1930) in Des Moines, Iowa, using XGBoost record linkage. Identified parents: father C Johnson (~0.92 confidence) and father Charles Johnson (~0.92 confidence) and father Carl Johnson (~0.92 confidence) and mother Amanda Johnson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
C Johnson
b. ~1870
Source father
● Household
· direct · ~0.92
Father
Charles Johnson
b. ~1870
Source father
● Household
· direct · ~0.92
Father
Carl Johnson
b. ~1871
Source father
● Household
· direct · ~0.92
Mother
Amanda Johnson
b. ~1877
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Ralph Johnson
Son · 1930 · age 22 · b. ~1908 · Iowa
★ You are viewing this record
Sibling
Selma Johnson
Sibling · 1930 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gilbert Johnson
Sibling · 1930 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Virginia Johnson
Sibling · 1930 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eleanor Johnson
Sibling · 1930 · age 32
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 — Des Moines, Iowa
Open full size
1930 US Federal Census — Des Moines, Iowa
Page Contents
50 people indexed on this census page (ia:1930:iowacensus00reel652:0817)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Floyd J. Trava | 11 | son | — | Illinois |
| 52 | Betty J. Trava | 6 | daughter | — | Iowa |
| 53 | Donald L. Trava | 4 | son | — | Iowa |
| 54 | Robert L. Trava | 0 | son | — | Iowa |
| 55 | Albert M. Thurd | 68 | Head | Salesman | Illinois |
| 56 | Mary E. Thurd | 59 | Wife-H | — | Illinois |
| 57 | Frank E. Peterson | 50 | Lodger | Carpenter | Sweden |
| 58 | Seth C. Webb | 32 | Head | Machinist | Nebraska |
| 59 | Adra R. Webb | 30 | Wife-H | — | Oregon |
| 60 | Harry C. Webb | 13 | son | — | Nebraska |
| 61 | Cleo B. Webb | 9 | daughter | — | Illinois |
| 62 | Wayne E. Webb | 7 | son | — | Iowa |
| 63 | Ralph E. Webb | 3 | son | — | Iowa |
| 64 | James W. Webb | 1 | son | — | Iowa |
| 65 | Edward D. Danielson | 35 | Head | Blacksmith Helper | Iowa |
| 66 | Naomi J. Danielson | 33 | Wife-H | — | Iowa |
| 67 | Emil F. Pierson | 72 | Head | — | Sweden |
| 68 | Matilda Pierson | 77 | Wife-H | — | Sweden |
| 69 | Nettie Bell | 49 | Head-H | — | Iowa |
| 70 | James Bell | 57 | brother | Fireman | Iowa |
| 71 | John L. Soderberg | 83 | Head | — | Sweden |
| 72 | Liza J. Soderberg | 84 | Wife-H | — | Sweden |
| 73 | C. E. Johnson | 28 | Head | Auto Mechanic | Iowa |
| 74 | Marion H. Johnson | 23 | Wife-H | Stenographer | Iowa |
| 75 | Chester V. Mason | 31 | Head | Foreman | Iowa |
| 76 | Pauline D. Mason | 30 | Wife-H | — | Germany |
| 77 | Le Roy W. Mason | 8 | son | — | Iowa |
| 78 | Marion B. Mason | 5 | daughter | — | Iowa |
| 79 | Kenneth L. Mason | 2 | son | — | Iowa |
| 80 | Sophie J. Rodin | 70 | Head-H | — | Sweden |
| 81 | William L. Perkins | 52 | Head | Machinist Helper | Iowa |
| 82 | May C. Perkins | 52 | Wife-H | — | Illinois |
| 83 | Lisle Perkins | 22 | son | Auto Mechanic | Iowa |
| 84 | Eva M. Perkins | 24 | daughter-in-law | Nurse | Iowa |
| 85 | Roy A. Nelson | 27 | Head | Auto Mechanic | Iowa |
| 86 | Eva M. Nelson | 22 | Wife-H | — | Illinois |
| 87 | Albert E. Anderson | 41 | Head | Moulder Helper | Iowa |
| 88 | Verda A. Anderson | 39 | Wife-H | — | Iowa |
| 89 | Gretel M. Anderson | 15 | daughter | — | Iowa |
| 90 | Lucille A. Anderson | 11 | daughter | — | Iowa |
| 91 | Charles A. Johnson | 60 | Head | Moulder | Sweden |
| 92 | Amanda E. Johnson | 58 | Wife-H | — | Sweden |
| 93 | Eleanor L. Johnson | 32 | daughter | Office Clerk | Iowa |
| 94 | Ralph A. Johnson THIS PERSON | 22 | son | Storekeeper | Iowa |
| 95 | Selma V. Johnson | 20 | daughter | Packer | Iowa |
| 96 | Virginia E. Johnson | 13 | daughter | — | Iowa |
| 97 | Gilbert L. Johnson | 11 | son | — | Iowa |
| 98 | Nickolas H. Martin | 45 | Head | Finisher | Iowa |
| 99 | Celia C. Martin | 38 | Wife-H | — | Iowa |
| 100 | George M. Martin | 9 | son | — | Texas |
Related Census Records
Pedigree Summary
Ralph + 4 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 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)