JC
John Chase — 1940 US Census Record
Model Tree available1940 United States Federal Census · Calvert-County, Maryland
Our Model Tree links this John Chase across the 1920, 1930 and 1940 US Censuses in Calvert-County, Maryland (XGBoost, ~Confirmed), with identified parents John & John — first a son (b.~1919), then head of a 11-person household.
Age 21
b. ~1919
Male
Son
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Calvert-County, Maryland |
| Surname | Chase |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Election Dis. 2 |
| 1935 Residence (County) | Calvert |
| Additional Details | |
| Occupation | Helper |
| Industry | Farm |
| Class of Worker | PW |
| Hours Worked | 52 |
| Income (1939) | 960 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Helper |
| Township / Ward | Election Dis 2 |
| Est. Birth Year | ~1919 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Chase | Spouse | — | 67 | ~1873 |
| Minnie Chase | Daughter | — | 19 | ~1921 |
| Helen Chase | Daughter | — | 15 | ~1925 |
| Clyde Chase | Other | — | 3 | ~1937 |
| Victoria Chase | Daughter | — | 23 | ~1917 |
| Roy Chase | Son | — | 11 | ~1929 |
| Minnie Chase | Head | — | 56 | ~1884 |
| George Mullen | Other | — | 19 | ~1921 |
| Ruth Chase | Daughter | — | 24 | ~1916 |
| John Chase | Son | — | 21 | ~1919 |
| Eugene Chase | Son | — | 30 | ~1910 |
Census Appearances
1920
Calvert, Maryland
Son, age 1
Calvert, Maryland · implied b. ~1919 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Chase |
| Given Name | John R |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read | No |
| Can Write | No |
| Mother Tongue | English |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Calvert, Maryland
Son, age 10
Calvert, Maryland · implied b. ~1920 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Chase |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Calvert-County, Maryland
Son, age 21
Calvert-County, Maryland · implied b. ~1919 — 11 household members
| Surname | Chase |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Election Dis. 2 |
| 1935 Residence (County) | Calvert |
| Occupation | Helper |
| Industry | Farm |
| Class of Worker | PW |
| Hours Worked | 52 |
| Income (1939) | 960 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| 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 Chase across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Chase (~0.92 confidence) and father John Chase (~0.92 confidence) and mother Alice Chase (~0.92 confidence) and mother Mary Chase (~0.92 confidence) and mother Minnie Chase (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Chase
b. ~1873
Source father
● Household
· direct · ~0.92
Father
John Chase
b. ~1873
Source father
● Household
· direct · ~0.92
Mother
Alice Chase
b. ~1883
Source mother
● Household
· direct · ~0.92
Mother
Mary Chase
b. ~1878
Source mother
● Household
· direct · ~0.92
Mother
Minnie Chase
b. ~1884
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Chase
Son · 1940 · age 21 · b. ~1919 · Maryland
★ You are viewing this record
Sibling
Ruth Chase
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Roy Chase
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eugene Chase
Sibling · 1940 · age 30
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Victoria Chase
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Chase
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Minnie Chase
Sibling · 1940 · age 19
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 — Calvert-County, Maryland
Open full size
1940 US Federal Census — Calvert-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01543-00180)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Minnie Chase | 56 | Head | — | Maryland |
| 42 | John Chase | 67 | Husband | Farmer | Maryland |
| 43 | Ruth Chase | 24 | Daughter | — | Maryland |
| 44 | John Chase THIS PERSON | 21 | Son | Helper | Maryland |
| 45 | Minnie Chase | 19 | Daughter | — | Maryland |
| 46 | Helen Chase | 15 | Daughter | — | Maryland |
| 47 | Roy Chase | 11 | Son | — | Maryland |
| 48 | Eugene Chase | 30 | Son | Farmer | Maryland |
| 49 | Victoria Chase | 23 | Daughter | Servant | Maryland |
| 50 | Clyde Chase | 3 | Grandson | — | Maryland |
| 51 | George Mullen | 19 | Nephew | Helper | Maryland |
| 52 | Henry Bowie | 60 | Head | — | Maryland |
| 53 | Ellen Stanford | 67 | Cousin | — | Maryland |
| 54 | Julius Gibson | 73 | Head | Farmer | Maryland |
| 55 | Ida Gibson | 72 | Wife | — | Maryland |
| 56 | Virginia Gibson | 32 | Daughter | — | Maryland |
| 57 | Ellen Trott | 47 | Head | Farmer | Maryland |
| 58 | Edna Trott | 47 | Wife | — | Maryland |
| 59 | Edgar Trott | 21 | Son | Farmer | Maryland |
| 60 | Raymond Trott | 16 | Son | — | Maryland |
| 61 | Howard Gibson | 62 | Head | Farmer | Maryland |
| 62 | Hallie Gibson | 62 | Wife | — | Maryland |
| 63 | Clifton Gibson | 35 | Son | Farmer | Maryland |
| 64 | Eldridge Gibson | 28 | Head | Farmer | Maryland |
| 65 | Mary Gibson | 20 | Wife | — | Maryland |
| 66 | Stanley Buckler | 26 | Head | Farmer | Maryland |
| 67 | Etta Buckler | 26 | Wife | Secretary | Maryland |
| 68 | Jean Buckler | 5 | Daughter | — | Maryland |
| 69 | Peggy Buckler | 4 | Daughter | — | Maryland |
| 70 | Doris Buckler | 3 | Daughter | — | Maryland |
| 71 | William Buckler | 1 | Son | — | Maryland |
| 72 | John Buckler | 0 | Son | — | Maryland |
| 73 | John Buckmaster | 52 | Head | Farmer | Maryland |
| 74 | Emma Buckmaster | 52 | Wife | — | Maryland |
| 75 | William Parsons | 50 | Head | Laborer | Maryland |
| 76 | Edward Parsons | 60 | Brother | Well Digger | Maryland |
| 77 | Gullum Parsons | 20 | Nephew | Helper | Maryland |
| 78 | John Prackall | 71 | Head | Farmer | Maryland |
| 79 | Alithar Prackall | 57 | Wife | — | Maryland |
| 80 | Irene Brooks | 11 | Grand daughter | — | Maryland |
Related Census Records
Pedigree Summary
John + 6 siblings
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)