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Mary Lucas — 1940 US Census Record
Model Tree available1940 United States Federal Census · Marion-County, Indiana
Our Model Tree links this Mary Lucas across the 1920, 1930 and 1940 US Censuses in Marion-County, Indiana (XGBoost, ~Confirmed), with identified parents Charles & William — first a daughter (b.~1916), then head of a 8-person household.
Age 24
b. ~1916
Female
Daughter
Born: Indiana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Marion-County, Indiana |
| Surname | Lucas |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Indianapolis |
| 1935 Residence (County) | Marion |
| Additional Details | |
| Occupation | Stenographer |
| Industry | Casualty Co. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 750 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Occupation | Stenographer |
| Township / Ward | Indianapolis |
| Est. Birth Year | ~1916 |
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 Lucas | Daughter | — | 24 | ~1916 |
| Paula Hintze | Daughter | — | 21 | ~1919 |
| William Lucas | Head | — | 57 | ~1883 |
| Alex Fills | Other | — | 22 | ~1918 |
| Thomas Lester | Other | — | 9 | ~1931 |
| Hubert Foster | Other | — | 35 | ~1905 |
| Eleanor Hamilton | Other | — | 75 | ~1865 |
| Golda Lucas | Spouse | — | 53 | ~1887 |
Census Appearances
1920
Marion, Indiana
Daughter, age 4
Marion, Indiana · implied b. ~1916 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lucas |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Occupation | none |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1930
Marion, Indiana
Daughter, age 14
Marion, Indiana · implied b. ~1916 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lucas |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Can Read/Write | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Marion-County, Indiana
Daughter, age 24
Marion-County, Indiana · implied b. ~1916 — 8 household members
| Surname | Lucas |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Indianapolis |
| 1935 Residence (County) | Marion |
| Occupation | Stenographer |
| Industry | Casualty Co. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 750 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
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 Lucas across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Charles Lucas (~0.92 confidence) and father William Lucas (~0.92 confidence) and mother Golda Lucas (~0.92 confidence) and mother Lola Lucas (~0.92 confidence) and mother Ivy Lucas (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Charles Lucas
b. ~1883
Source father
● Household
· direct · ~0.92
Father
William Lucas
b. ~1883
Source father
● Household
· direct · ~0.92
Mother
Golda Lucas
b. ~1887
Source mother
● Household
· direct · ~0.92
Mother
Lola Lucas
b. ~1887
Source mother
● Household
· direct · ~0.92
Mother
Ivy Lucas
b. ~1891
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Lucas
Daughter · 1940 · age 24 · b. ~1916 · Indiana
★ You are viewing this record
Sibling
Paula Hintze
Sibling · 1940 · age 21
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 — Marion-County, Indiana
Open full size
1940 US Federal Census — Marion-County, Indiana
Page Contents
24 people indexed on this census page (nara:1940:m-t0627-01122-00645)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 3 | Willard Finney | 12 | Son | — | Indiana |
| 4 | Elizabeth Ricketts | 74 | Mother | — | Northern Ireland |
| 6 | T. C. Phipps | 42 | Head | Traveling Salesman | North Carolina |
| 7 | Lottie Phipps | 42 | Wife | — | North Carolina |
| 8 | Mabel Bell Phipps | 21 | Daughter | — | North Carolina |
| 9 | Tom Canady Phipps | 18 | Son | — | North Carolina |
| 11 | James W. Elliott | 27 | Head | Freight Solicitor | Indiana |
| 12 | Mary Frances Elliott | 25 | Wife | — | Indiana |
| 13 | Judith Ann Elliott | 2 | Daughter | — | Indiana |
| 14 | Jan Walter Elliott | 0 | Son | — | Indiana |
| 16 | Charles Justus | 25 | Brother-in-law | Truck Driver | Indiana |
| 17 | Irene Justus | 27 | Sister | — | Indiana |
| 19 | Paul Breher | 15 | Son | — | Indiana |
| 21 | Hazel Parsley | 55 | Mother | — | Indiana |
| 23 | James W. Goble | 29 | Son | Clerk | Indiana |
| 25 | Thomas Featheringill | 4 | Son | — | Indiana |
| 27 | William E. Lucas | 57 | Head | Clerk | Indiana |
| 28 | Golda D. Lucas | 53 | Wife | — | Illinois |
| 29 | Mary E. Lucas THIS PERSON | 24 | Daughter | Stenographer | Indiana |
| 31 | Alex Fills | 22 | Nephew | Hatter | Indiana |
| 33 | Eleanor Hamilton | 75 | Mother | — | Indiana |
| 35 | Paula Hintze | 21 | Daughter | Inspector | Kansas |
| 37 | Hubert E. Foster | 35 | Nephew | Window Trimmer | Indiana |
| 39 | Thomas Lester | 9 | Servant | — | Kentucky |
Pedigree Summary
Mary + 1 sibling
Gen 1 · 5 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)