JD
John Day — 1940 US Census Record
Model Tree available1940 United States Federal Census · Harford-County, Maryland
Our Model Tree links this John Day across the 1920, 1930 and 1940 US Censuses in Harford-County, Maryland (XGBoost, ~Confirmed), with identified parents William & Eliza — first a head (b.~1899), then head of a 4-person household.
Age 41
b. ~1899
Male
Head
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Harford-County, Maryland |
| Surname | Day |
| Given Name | John T. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | District 5 |
| 1935 Residence (County) | Harford |
| Additional Details | |
| Occupation | Farmer |
| Industry | Own Farm |
| Class of Worker | OA |
| Hours Worked | 56 |
| Income (1939) | 0 |
| Highest Grade | H-2 |
| 1935 Residence | Same house |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Farmer |
| Township / Ward | District 5 |
| Est. Birth Year | ~1899 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Betty Day | Daughter | — | 8 | ~1932 |
| John Day | Head | — | 41 | ~1899 |
| John Day | Son | — | 10 | ~1930 |
| Aleatha Day | Spouse | — | 36 | ~1904 |
Census Appearances
1920
Harford, Maryland
Son, age 20
Harford, Maryland · implied b. ~1900 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Day |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Labour |
| Industry | Home Farm |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Harford, Maryland
Head, age 30
Harford, Maryland · implied b. ~1900 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Day |
| Given Name | John T. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Maryland |
| Age at First Marriage | 26 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | VVVV E |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Harford-County, Maryland
Head, age 41
Harford-County, Maryland · implied b. ~1899 — 4 household members
| Surname | Day |
| Given Name | John T. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | District 5 |
| 1935 Residence (County) | Harford |
| Occupation | Farmer |
| Industry | Own Farm |
| Class of Worker | OA |
| Hours Worked | 56 |
| Income (1939) | 0 |
| Highest Grade | H-2 |
| 1935 Residence | Same house |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
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 Day across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Day (~0.92 confidence) and mother Eliza Day (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Day
b. ~1854
Source father
● Household
· direct · ~0.92
Mother
Eliza Day
b. ~1861
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Day
Head · 1940 · age 41 · b. ~1899 · Maryland
★ 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 — Harford-County, Maryland
Open full size
1940 US Federal Census — Harford-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01551-00828)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mildred J. Jordan | 1 | Daughter | — | Maryland |
| 2 | Howard Orr | 57 | Head | Farmer | Maryland |
| 3 | Irene Orr | 50 | Wife | — | Maryland |
| 4 | Beulah Orr | 19 | Daughter | New Worker | Maryland |
| 5 | Earl Jr. Orr | 11 | Son | — | Maryland |
| 6 | Earl Sr. Orr | 30 | Head | Laborer | Maryland |
| 7 | Virginia Orr | 21 | Wife | — | Maryland |
| 8 | Dorothy Orr | 10 | Daughter | — | Maryland |
| 9 | Mahlon H. Mcclelland | 72 | Head | Farmer | Maryland |
| 10 | Eileen Mcclelland | 67 | Wife | — | Maryland |
| 11 | Lillian Mcclelland | 27 | Daughter | Operator | Maryland |
| 12 | Zolman Little | 32 | Head | Laborer | Maryland |
| 13 | Margaret Little | 19 | Wife | Seamstress | Maryland |
| 14 | Subie Little | 1 | Daughter | — | Maryland |
| 15 | Edna Vaughn | 42 | Head | — | Virginia |
| 16 | Elizabeth Vaughn | 18 | Daughter | — | Virginia |
| 17 | Kathleen Vaughn | 15 | Daughter | — | Tennessee |
| 18 | James Vaughn | 8 | Son | — | Maryland |
| 19 | Daniel Vaughn | 6 | Son | — | Maryland |
| 20 | William F. Crouse | 62 | Head | Farmer | N. Carolina |
| 21 | Docia Crouse | 52 | Wife | — | N. Carolina |
| 22 | Blanche Crouse | 16 | Daughter | Housework | Maryland |
| 23 | Grace Crouse | 15 | Daughter | New Worker | Maryland |
| 24 | Opal Crouse | 12 | Daughter | — | Maryland |
| 25 | Herbert Crouse | 8 | Son | — | Maryland |
| 26 | Melvin Crouse | 6 | Son | — | Maryland |
| 27 | Gwen Crouse | 7 | Son | Assembler | N. Carolina |
| 28 | Nellie Jeremiah | 53 | Head | Farmer | Maryland |
| 29 | Wayne Edwards | 40 | Head | Farmer | N. Carolina |
| 30 | Maggie Edwards | 44 | Wife | — | N. Carolina |
| 31 | Luke Bennett | 21 | Head | Farm Hand | W. Virginia |
| 32 | Erma Bennett | 18 | Wife | — | Maryland |
| 33 | John Bennett | 2 | Son | — | Maryland |
| 34 | John T. Day THIS PERSON | 41 | Head | Farmer | Maryland |
| 35 | Aleatha Day | 36 | Wife | — | Maryland |
| 36 | John T. Jr. Day | 10 | Son | — | Maryland |
| 37 | Betty J. Day | 8 | Daughter | — | Maryland |
| 38 | Cannon Mcmillan | 36 | Head | Farmer | N. Carolina |
| 39 | Dora Mcmillan | 34 | Wife | — | N. Carolina |
| 40 | Lula Mcmillan | 15 | Daughter | — | N. Carolina |
Pedigree Summary
John
Gen 1 · 2 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)