JC
John Connolly — 1940 US Census Record
Model Tree available1940 United States Federal Census · Polk-County, Iowa
Our Model Tree links this John Connolly across the 1920, 1930 and 1940 US Censuses in Polk-County, Iowa (XGBoost, ~Confirmed), with identified parents John & Fern — first a son (b.~1918), then head of a 10-person household.
Age 22
b. ~1918
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Iowa |
| Surname | Connolly |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Additional Details | |
| Industry | 250 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same house |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Des Moines 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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Richard Connolly | Son | — | 18 | ~1922 |
| Mary Connolly | Daughter | — | 11 | ~1929 |
| William Connolly | Son | — | 8 | ~1932 |
| John Connolly | Head | — | 49 | ~1891 |
| John Connolly | Son | — | 22 | ~1918 |
| Eleanor Connolly | Daughter | — | 17 | ~1923 |
| Margaret Connolly | Daughter | — | 16 | ~1924 |
| Fern Connolly | Spouse | — | 45 | ~1895 |
| Marcella Connolly | Daughter | — | 12 | ~1928 |
| Bernard Connolly | Son | — | 19 | ~1921 |
Census Appearances
1920
Polk, Iowa
Son, age 1
Polk, Iowa · implied b. ~1919 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Connolly |
| Given Name | John Jr. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
Son, age 12
Polk, Iowa · implied b. ~1918 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Connelly |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Polk-County, Iowa
Son, age 22
Polk-County, Iowa · implied b. ~1918 — 10 household members
| Surname | Connolly |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Industry | 250 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same house |
| 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 John Connolly across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Connolly (~0.92 confidence) and mother Fern Connolly (~0.92 confidence) and mother Fern Connolly (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Connolly
b. ~1893
Source father
● Household
· direct · ~0.92
Mother
Fern Connolly
b. ~1895
Source mother
● Household
· direct · ~0.92
Mother
Fern Connolly
b. ~1895
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Connolly
Son · 1940 · age 22 · b. ~1918 · Iowa
★ You are viewing this record
Sibling
Margaret Connolly
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eleanor Connolly
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bernard Connolly
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marcella Connolly
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Connolly
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Connolly
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Connolly
Sibling · 1940 · age 11
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
1940 US Federal Census — Polk-County, Iowa
Open full size
1940 US Federal Census — Polk-County, Iowa
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01193-00137)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Freeley, Mary K. Feeley | 3 | Daughter | — | Iowa |
| 42 | Harry E. Reynolds | 48 | Head | Superintendent | Iowa |
| 43 | Daisy E. Reynolds | 44 | Wife | — | Nebraska |
| 44 | Alberte Lane | 36 | Head | Manager | Kansas |
| 45 | Edna Lane | 36 | Wife | — | Missouri |
| 46 | Rowena Lane | 5 | Daughter | — | Missouri |
| 47 | Leslie C. Hoke | 61 | Head | Barber | Iowa |
| 48 | Minnie A. Hoke | 60 | Wife | — | Iowa |
| 49 | Earl M. Jones | 47 | Head | Carpenter | Iowa |
| 50 | Hazel M. Jones | 49 | Wife | — | Iowa |
| 51 | Kenneth Jones | 22 | Son | Truck Driver | Montana |
| 52 | Arnold G. Kieffer | 43 | Head | Representative | Iowa |
| 53 | Myrtle M. Kieffer | 42 | Wife | — | Iowa |
| 54 | Mary M. Kieffer | 18 | Daughter | — | Iowa |
| 55 | William J. Kieffer | 7 | Son | — | Iowa |
| 56 | Ann K. Kieffer | 2 | Daughter | — | Iowa |
| 57 | Lisle E. Kirkwood | 34 | Head | Attendant | Iowa |
| 58 | Hazel I. Kirkwood | 32 | Wife | — | Iowa |
| 59 | Richard Kirkwood | 9 | Son | — | Iowa |
| 60 | Marilyn J. Kirkwood | 5 | Daughter | — | Iowa |
| 61 | Lisle D. Kirkwood | 4 | Son | — | Iowa |
| 63 | John Jr. Connolly | 49 | Head | Lawyer | Iowa |
| 64 | Fern Connolly | 45 | Wife | — | Iowa |
| 65 | John Connolly THIS PERSON | 22 | Son | — | Iowa |
| 66 | Bernard Connolly | 19 | Son | — | Iowa |
| 67 | Richard Connolly | 18 | Son | — | Iowa |
| 68 | Eleanor Connolly | 17 | Daughter | — | Iowa |
| 69 | Margaret Connolly | 16 | Daughter | — | Iowa |
| 70 | Marcella Connolly | 12 | Daughter | — | Iowa |
| 71 | Mary Alice Connolly | 11 | Daughter | — | Iowa |
| 72 | William Connolly | 8 | Son | — | Iowa |
| 73 | Walter R. Kirsch | 44 | Head | Jeweler | Iowa |
| 74 | Lucy E. Kirsch | 48 | Wife | — | Iowa |
| 75 | Robert Kirsch | 15 | Son | — | Iowa |
| 76 | Francis Kirsch | 12 | Son | — | Iowa |
| 77 | Herman Kirsch | 80 | Father | — | Germany |
| 78 | Franciska Kirsch | 75 | Mother | — | Germany |
| 79 | Wren L. Dipson | 50 | Head | Maintainer | Iowa |
| 80 | Clella Dipson | 49 | Wife | — | Iowa |
Pedigree Summary
John + 7 siblings
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 1940 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)