MC
Mary Connelly — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Dubuque-County, Iowa
Our Model Tree links this Mary Connelly across the 1930 and 1940 US Censuses in Dubuque-County, Iowa (XGBoost, ~Confirmed) — first a spouse (b.~1888), then head of a 8-person household.
Age 52
b. ~1888
Female
Spouse
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Dubuque-County, Iowa |
| Surname | Connelly |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Taylor Township |
| 1935 Residence (County) | Dubuque |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Taylor Township |
| Est. Birth Year | ~1888 |
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 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Connelly | Spouse | — | 52 | ~1888 |
| Leola Connelly | Daughter | — | 20 | ~1920 |
| Joseph Connelly | Son | — | 22 | ~1918 |
| Marvin Connelly | Son | — | 9 | ~1931 |
| William Connelly | Head | — | 52 | ~1888 |
| Wilbert Connelly | Son | — | 15 | ~1925 |
| Lorraine Connelly | Daughter | — | 19 | ~1921 |
| Francis Connelly | Son | — | 12 | ~1928 |
Census Appearances
1930
Dubuque, Iowa
Other, age 41
Dubuque, Iowa · implied b. ~1889 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Connelly |
| Given Name | Mary A. |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 26 |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Dubuque-County, Iowa
Spouse, age 52
Dubuque-County, Iowa · implied b. ~1888 — 8 household members
| Surname | Connelly |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Taylor Township |
| 1935 Residence (County) | Dubuque |
| Class of Worker | 0 |
| Highest Grade | 8 |
| 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 Mary Connelly across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Connelly
Spouse · 1940 · age 52 · b. ~1888 · Iowa
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Dubuque-County, Iowa
Open full size
1940 US Federal Census — Dubuque-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01159-00684)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Annie Conlon | 42 | Daughter | — | Iowa |
| 2 | Delbert Connelly | 14 | Head | — | Iowa |
| 3 | William Connelly | 52 | Head | Farming | Iowa |
| 4 | Mary Connelly THIS PERSON | 52 | Wife | — | Iowa |
| 5 | Joseph Connelly | 22 | Son | Farm Labor | Iowa |
| 6 | Leola Connelly | 20 | Daughter | Servant | Iowa |
| 7 | Lorraine Connelly | 19 | Daughter | Housework | Iowa |
| 8 | Wilbert Connelly | 15 | Son | Labor Farm | Iowa |
| 9 | Francis Connelly | 12 | Son | — | Iowa |
| 10 | Marvin Connelly | 9 | Son | — | Iowa |
| 11 | Raymond Larrance | 39 | Head | Telegrapher | Iowa |
| 12 | Janet Larrance | 40 | Wife | — | Iowa |
| 13 | David Larrance | 13 | Son | — | Iowa |
| 14 | Ethel Larrance | 12 | Daughter | — | Iowa |
| 15 | Catherine Larrance | 10 | Daughter | — | Iowa |
| 16 | Mary Janet Larrance | 4 | Daughter | — | Iowa |
| 17 | Alphonse Koopman | 36 | Head | Farming | Iowa |
| 18 | Statia Koopman | 29 | Wife | — | Iowa |
| 19 | Daniel Koopman | 7 | Son | — | Iowa |
| 20 | Catherine Koopman | 5 | Daughter | — | Iowa |
| 21 | Virginia Koopman | 3 | Daughter | — | Iowa |
| 22 | Lois Koopman | 0 | Daughter | — | Iowa |
| 23 | Charles Kloch | 18 | Hired man | Labor Farm | Iowa |
| 24 | Frederick Mausser | 54 | Head | Farming | Austria |
| 25 | Johanna Mausser | 53 | Wife | — | Iowa |
| 26 | Joseph Mausser | 28 | Son | Labor Farm | Iowa |
| 27 | Bernard Mausser | 22 | Son | Labor Farm | Iowa |
| 28 | Rita Mausser | 16 | Daughter | — | Iowa |
| 29 | Clement Mausser | 10 | Son | — | Iowa |
| 30 | Edward Bradley | 47 | Head | Farming | Iowa |
| 31 | Mary Bradley | 41 | Wife | — | Iowa |
| 32 | Cecelia Bradley | 10 | Daughter | — | Iowa |
| 33 | Cyril Mcdermott | 29 | Head | Farming | Iowa |
| 34 | Viola Mcdermott | 28 | Wife | — | Iowa |
| 35 | Dorrance Mcdermott | 4 | Son | — | Iowa |
| 36 | Louis Mcdermott | 3 | Son | — | Iowa |
| 37 | Phylis Mcdermott | 0 | Daughter | — | Iowa |
| 38 | Mary Mrs Casey | 71 | Head | — | Iowa |
| 39 | Ladis Casey | 43 | Son | Farming | Iowa |
| 40 | Everitt Casey | 38 | Son | Farming | Iowa |
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)