IB
Ira Brown — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Sanilac-County, Michigan
Our Model Tree links this Ira Brown across the 1930 and 1940 US Censuses in Sanilac-County, Michigan (XGBoost, ~Confirmed) — first a daughter (b.~1920), then head of a 7-person household.
Age 20
b. ~1920
Female
Daughter
Born: Michigan
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Sanilac-County, Michigan |
| Surname | Brown |
| Given Name | Ira F. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Sanilac |
| Additional Details | |
| Industry | H |
| Class of Worker | NP |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Mich. |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Township / Ward | Greenleaf |
| Est. Birth Year | ~1920 |
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 1940 census.
| Name | Relation to head | Relative to Ira | Age | Birth yr |
|---|---|---|---|---|
| Marie Brown | Daughter | — | 17 | ~1923 |
| Leigh Brown | Son | — | 15 | ~1925 |
| Ernest Brown | Son | — | 11 | ~1929 |
| Earl Brown | Son | — | 8 | ~1932 |
| Ira Brown | Daughter | — | 20 | ~1920 |
| Thomas Brown | Head | — | 52 | ~1888 |
| Margaret Brown | Spouse | — | 50 | ~1890 |
Census Appearances
1930
Sanilac, Michigan
Daughter, age 10
Sanilac, Michigan · implied b. ~1920 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Brown |
| Given Name | Iva |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Wisconsin |
| Can Read/Write | Yes |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
Sanilac-County, Michigan
Daughter, age 20
Sanilac-County, Michigan · implied b. ~1920 — 7 household members
| Surname | Brown |
| Given Name | Ira F. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Sanilac |
| Industry | H |
| Class of Worker | NP |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Mich. |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
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 Ira Brown across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Ira Brown
Daughter · 1940 · age 20 · b. ~1920 · Michigan
★ You are viewing this record
Sibling
Marie Brown
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ernest Brown
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leigh Brown
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Earl Brown
Sibling · 1940 · age 8
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 — Sanilac-County, Michigan
Open full size
1940 US Federal Census — Sanilac-County, Michigan
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01818-00405)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Charles Holm | 13 | Son | — | Wisconsin |
| 42 | Robert Holm | 12 | Son | — | Michigan |
| 43 | John Holm | 8 | Son | — | Michigan |
| 44 | Adele Holm | 6 | Daughter | — | Michigan |
| 45 | Arthur J. Toutant | 73 | Father-in-law | Laborer | Canada-French |
| 46 | Curtis J. Cleland | 24 | Head | Farming | Michigan |
| 47 | Velma Cleland | 19 | Wife | — | Michigan |
| 48 | Eugene W. Cleland | 1 | Son | — | Michigan |
| 49 | Guy Cleland | 52 | Head | Farming | Michigan |
| 50 | Halter F. Tracey | 65 | Head | — | Canada-Eng |
| 51 | Isabelle Tracey | 68 | Wife | — | Canada-Eng |
| 52 | William S. Gleason | 59 | Head | — | Iowa |
| 53 | Lloyd H. Brown | 54 | Head | Farming | Michigan |
| 54 | Clara M. Brown | 43 | Wife | — | Michigan |
| 55 | Jay Brown | 16 | Son | — | Michigan |
| 56 | Florence J. Brown | 15 | Daughter | — | Michigan |
| 57 | Robert H. Brown | 12 | Son | — | Michigan |
| 58 | Clare M. Brown | 10 | Son | — | Michigan |
| 59 | Keith N. Brown | 2 | Son | — | Michigan |
| 60 | William M. Nicol | 54 | Head | Farming | Michigan |
| 61 | Anna Pelton | 46 | Sister | — | Michigan |
| 62 | James A. Nicol | 66 | Head | Farming | Michigan |
| 63 | Charlotte Nicol | 67 | Wife | — | Michigan |
| 64 | Don J. Nicol | 8 | Son-in-law | — | Michigan |
| 65 | James A. Pettinger | 64 | Head | Farming | Canada-Eng |
| 66 | Phoebe Pettinger | 60 | Wife | — | Michigan |
| 67 | Charles Endersby | 20 | Hired man | Laborer | Iowa |
| 68 | Thomas M. Brown | 52 | Head | Laborer | Michigan |
| 69 | Margaret A. Brown | 50 | Wife | — | Michigan |
| 70 | Ira F. Brown THIS PERSON | 20 | Daughter | — | Michigan |
| 71 | Marie A. Brown | 17 | Daughter | — | Michigan |
| 72 | Leigh C. Brown | 15 | Son | New Worker | Michigan |
| 73 | Ernest C. Brown | 11 | Son | — | Michigan |
| 74 | Earl N. Brown | 8 | Son | — | Michigan |
| 75 | Albert Kolar | 34 | Head | Farming | Michigan |
| 76 | Mary C. Kolar | 33 | Wife | — | Wisconsin |
| 77 | James A. Kolar | 5 | Son | — | Michigan |
| 78 | Carl J. Kolar | 2 | Son | — | Michigan |
| 79 | Robert C. Spencer | 54 | Head | Farming | Michigan |
| 80 | Mary Spencer | 43 | Wife | — | Michigan |
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)