WM
William Martin — 1940 US Census Record
Model Tree available1940 United States Federal Census · Scott-County, Iowa
Our Model Tree links this William Martin across the 1920, 1930 and 1940 US Censuses in Scott-County, Iowa (XGBoost, ~Confirmed), with identified parents William & William — first a head (b.~1911), then head of a 5-person household.
Age 29
b. ~1911
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Scott-County, Iowa |
| Surname | Martin |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Davenport City |
| 1935 Residence (County) | Scott |
| Additional Details | |
| Occupation | Mason Contractor |
| Industry | Small Bldgs |
| Class of Worker | OA |
| Hours Worked | 50 |
| Income (1939) | 0 |
| Highest Grade | H-2 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Mason Contractor |
| Township / Ward | Davenport City |
| Est. Birth Year | ~1911 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Mary Martin | Daughter | — | 2 | ~1938 |
| William Martin | Head | — | 29 | ~1911 |
| William Martin | Son | — | 5 | ~1935 |
| Robert Martin | Son | — | 6 | ~1934 |
| Carmela Martin | Spouse | — | 29 | ~1911 |
Census Appearances
1920
Scott, Iowa
Son, age 9
Scott, Iowa · implied b. ~1911 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | William E |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Scott, Iowa
Son, age 19
Scott, Iowa · implied b. ~1911 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Scott-County, Iowa
Head, age 29
Scott-County, Iowa · implied b. ~1911 — 5 household members
| Surname | Martin |
| Given Name | William |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Davenport City |
| 1935 Residence (County) | Scott |
| Occupation | Mason Contractor |
| Industry | Small Bldgs |
| Class of Worker | OA |
| Hours Worked | 50 |
| Income (1939) | 0 |
| Highest Grade | H-2 |
| 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 William Martin across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Martin (~0.92 confidence) and father William Martin (~0.92 confidence) and mother Susan Martin (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Martin
b. ~1866
Source father
● Household
· direct · ~0.92
Father
William Martin
b. ~1866
Source father
● Household
· direct · ~0.92
Mother
Susan Martin
b. ~1874
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Martin
Head · 1940 · age 29 · b. ~1911 · Iowa
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Scott-County, Iowa
Open full size
1940 US Federal Census — Scott-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01202-01027)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Arthur Kenyon | 8 | Son | — | Iowa |
| 42 | Thomas Kenyon | 0 | Son | — | Iowa |
| 43 | Walter Whalen | 53 | Head | Auto Mechanic | Iowa |
| 44 | Alma Whalen | 53 | Wife | — | Iowa |
| 45 | Charles Whalen | 29 | Son | Salesman | Iowa |
| 46 | Frances Whalen | 25 | Daughter | Office Work | Iowa |
| 47 | Paul Whalen | 20 | Son | Clerk | Iowa |
| 48 | Richard Whalen | 11 | Son | — | Iowa |
| 49 | William Martin THIS PERSON | 29 | Head | Mason Contractor | Iowa |
| 50 | Carmela Martin | 29 | Wife | — | Iowa |
| 51 | Robert Martin | 6 | Son | — | Iowa |
| 52 | William Martin | 5 | Son | — | Iowa |
| 53 | Mary Martin | 2 | Daughter | — | Iowa |
| 54 | Clarence Bandway | 30 | Head | Clerk | Illinois |
| 55 | Imogen Bandway | 30 | Wife | Registered Nurse | Minnesota |
| 56 | Carol Ann Bandway | 3 | Daughter | — | Illinois |
| 57 | Walter R. Gruhl | 54 | Head | Salesman | Illinois |
| 58 | Frieda R. Gruhl | 50 | Wife | — | Iowa |
| 59 | Lois M. Gruhl | 25 | Daughter | Laboratory Technician | Iowa |
| 60 | Richard H. Gruhl | 16 | Son | Paper Carrier | Iowa |
| 61 | Mathilda Rux | 81 | Mother-in-law | — | Czechoslovakia |
| 62 | Fred G. Meyers | 59 | Head | — | Iowa |
| 63 | Marie Meyers | 61 | Wife | — | Iowa |
| 64 | William Pomroy | 67 | Lodger | Optometrist | Illinois |
| 65 | Louis Gruber | 56 | Head | Foreman | Illinois |
| 66 | Anna Gruber | 60 | Wife | — | Illinois |
| 67 | Mary Meyers | 79 | Mother-in-law | — | Iowa |
| 68 | Elizabeth Mcgovern | 79 | Head | — | Illinois |
| 69 | Margaret Mcgovern | 49 | Daughter | Registered Nurse | Iowa |
| 70 | Clem D. Kerrigan | 42 | Son-in-law | Dentist | Iowa |
| 71 | Jermine Kerrigan | 39 | Daughter | Laboratory Technician | Illinois |
| 72 | Elizabeth Murphy | 50 | Lodger | Saleslady | Iowa |
| 73 | Earl Ristenbacken | 34 | Head | Clerk | Iowa |
| 74 | Lillian Ristenbacken | 29 | Wife | — | Iowa |
| 75 | Alvin Ristenbacken | 11 | Son | — | Iowa |
| 76 | Edgar Ristenbacken | 9 | Son | — | Iowa |
| 77 | Arline Ristenbacken | 7 | Daughter | — | Iowa |
| 78 | August M. Egger | 58 | Head | Manager | Iowa |
| 79 | Sarah E. Egger | 54 | Wife | — | Nebraska |
| 80 | Don Green | 22 | Head | Shipping Clerk | Iowa |
Pedigree Summary
William
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)