JA
James Armstrong — 1930 US Census Record
Model Tree available1930 United States Federal Census · Dubuque, Iowa
Our Model Tree links this James Armstrong across the 1910, 1920 and 1930 US Censuses in Dubuque, Iowa (XGBoost, ~Confirmed), with identified parents Tony & Dave — first a son (b.~1910), then head of a 3-person household.
Age 20
b. ~1910
Male
Son
Born: Iowa
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Dubuque, Iowa |
| Surname | Armstrong |
| Given Name | James R. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Additional Details | |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Dyersville City |
| Est. Birth Year | ~1910 |
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.
3 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Tony Armstrong | Head | — | 53 | ~1877 |
| James Armstrong | Son | — | 20 | ~1910 |
| Martha Armstrong | Spouse | — | 52 | ~1878 |
Census Appearances
1910
Dubuque, Iowa
Son, age 1
Dubuque, Iowa · implied b. ~1909 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Armstrong |
| Given Name | James R |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1920
Dubuque, Iowa
Son, age 10
Dubuque, Iowa · implied b. ~1910 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Armstrong |
| Given Name | James A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Dubuque, Iowa
Son, age 20
Dubuque, Iowa · implied b. ~1910 — 3 household members
| Surname | Armstrong |
| Given Name | James R. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | none |
| 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 James Armstrong across 3 US Census years (1910, 1920 and 1930) in Dubuque, Iowa, using XGBoost record linkage. Identified parents: father Tony Armstrong (~0.92 confidence) and father Dave Armstrong (~0.92 confidence) and mother Martha Armstrong (~0.92 confidence) and mother Martha Armstrong (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Tony Armstrong
b. ~1877
Source father
● Household
· direct · ~0.92
Father
Dave Armstrong
b. ~1878
Source father
● Household
· direct · ~0.92
Mother
Martha Armstrong
b. ~1878
Source mother
● Household
· direct · ~0.92
Mother
Martha Armstrong
b. ~1878
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Armstrong
Son · 1930 · age 20 · b. ~1910 · Iowa
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Dubuque, Iowa
Open full size
1930 US Federal Census — Dubuque, Iowa
Page Contents
50 people indexed on this census page (ia:1930:iowacensus00reel654:0543)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ralph Silberman | 8 | son | None | Illinois |
| 2 | Meta Alsop | 75 | Head | None | New York |
| 3 | Blanche Alexander | 63 | Stepdaughter | None | Iowa |
| 4 | Louis Ludmayer | 50 | Head | Laborer | Iowa |
| 5 | Lucy Ludmayer | 50 | wife | None | Iowa |
| 6 | Valeria M. Ludmayer | 21 | daughter | Stenographer | Iowa |
| 7 | Flora M. Ludmayer | 16 | daughter | None | Iowa |
| 8 | William Lammers | 81 | Head | None | Holland |
| 9 | Mildred Lammers | 32 | daughter | Servant | Iowa |
| 10 | Lawrence Smith | 52 | Head | Editor | Iowa |
| 11 | Lilyan H. Smith | 47 | Wife | None | Iowa |
| 12 | Henry Millenberg | 49 | Head | Cashier | Iowa |
| 13 | Delia Millenberg | 49 | wife | None | Iowa |
| 14 | Elmer Millenberg | 22 | son | Accountant | Iowa |
| 15 | Ralph Millenberg | 19 | son | None | Iowa |
| 16 | Francis Millenberg | 18 | son | Bookkeeper | Iowa |
| 17 | Fredrick Millenberg | 17 | son | None | Iowa |
| 18 | Tony Armstrong | 53 | Head | Proprietor | Iowa |
| 19 | Martha Armstrong | 52 | wife | None | Iowa |
| 20 | James R. Armstrong THIS PERSON | 20 | son | None | Iowa |
| 21 | Mary Boutling | 84 | Head | None | England |
| 22 | Elizabeth Kramer | 58 | Head | None | Iowa |
| 23 | Genevieve Kramer | 20 | daughter | None | Iowa |
| 24 | Henry Mohnen | 53 | Head | Laborer | Iowa |
| 25 | Flora Mohnen | 50 | wife | None | Iowa |
| 26 | Arthur Mohnen | 14 | son | None | Iowa |
| 27 | Henry Kremer | 58 | Head | Cashier | Iowa |
| 28 | Bertha Kremer | 59 | wife | None | Iowa |
| 29 | Norma Kremer | 22 | daughter | None | Iowa |
| 30 | Helen Kremer | 19 | daughter | Seamstress | Iowa |
| 31 | Allen Kremer | 15 | son | None | Iowa |
| 32 | Raymond Kremer | 26 | son | None | Iowa |
| 33 | Henry Joester | 38 | Head | Laborer | Iowa |
| 34 | Rose Joester | 40 | wife | None | Iowa |
| 35 | Lucinda Joester | 8 | daughter | None | Iowa |
| 36 | Henry Flammang | 43 | Head | Proprietor | Iowa |
| 37 | Antoinette Flammang | 41 | wife | None | Iowa |
| 38 | Alethea Flammang | 11 | daughter | None | Iowa |
| 39 | James Flammang | 5 | son | None | Iowa |
| 40 | John Wolf | 44 | Head | Proprietor | Iowa |
| 41 | Magdalin Wolf | 38 | wife | None | Iowa |
| 42 | Norman Wolf | 15 | son | None | Iowa |
| 43 | Leroy Wolf | 13 | son | None | Iowa |
| 44 | Marvin Wolf | 11 | son | None | Iowa |
| 45 | Grace Wolf | 9 | daughter | None | Iowa |
| 46 | Helen Wolf | 7 | daughter | None | Iowa |
| 47 | John Wolf | 5 | son | None | Iowa |
| 48 | Donald Wolf | 1 | son | None | Iowa |
| 49 | Joseph Bullmeyer | 71 | Head | None | Iowa |
| 50 | Anna Bullmeyer | 72 | wife | None | Iowa |
Pedigree Summary
James
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)