JM
James Mccormick — 1940 US Census Record
Model Tree available1940 United States Federal Census · Frederick-County, Maryland
Our Model Tree links this James Mccormick across the 1920, 1930 and 1940 US Censuses in Frederick-County, Maryland (XGBoost, ~Confirmed), with identified parents J & James — first a son (b.~1916), then head of a 4-person household.
Age 24
b. ~1916
Male
Son
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Frederick-County, Maryland |
| Surname | McCormick |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Brunswick Town |
| 1935 Residence (County) | Frederick |
| Additional Details | |
| Occupation | Apprentice |
| Industry | Railroad |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 350 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Apprentice |
| Township / Ward | Brunswick Town |
| 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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Vivian Mccormick | Daughter | — | 20 | ~1920 |
| James Mccormick | Head | — | 53 | ~1887 |
| James Mccormick | Son | — | 24 | ~1916 |
| Lyna Mccormick | Spouse | — | 53 | ~1887 |
Census Appearances
1920
Frederick, Maryland
Son, age 3
Frederick, Maryland · implied b. ~1917 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCormick |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Frederick, Maryland
Son, age 14
Frederick, Maryland · implied b. ~1916 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCormick |
| Given Name | James |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Maryland |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Frederick-County, Maryland
Son, age 24
Frederick-County, Maryland · implied b. ~1916 — 4 household members
| Surname | McCormick |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Brunswick Town |
| 1935 Residence (County) | Frederick |
| Occupation | Apprentice |
| Industry | Railroad |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 350 |
| Highest Grade | Hs 4 |
| 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 James Mccormick across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father J Mccormick (~0.92 confidence) and father James Mccormick (~0.92 confidence) and mother Jennie Mccormick (~0.92 confidence) and mother Lyna Mccormick (~0.92 confidence) and father James Mccormick (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
J Mccormick
b. ~1887
Source father
● Household
· direct · ~0.92
Father
James Mccormick
b. ~1887
Source father
● Household
· direct · ~0.92
Mother
Jennie Mccormick
b. ~1887
Source mother
● Household
· direct · ~0.92
Mother
Lyna Mccormick
b. ~1887
Source mother
● Household
· direct · ~0.92
Father
James Mccormick
b. ~1888
Source father
● Household
· direct · ~0.92
This person
Anchor record
James Mccormick
Son · 1940 · age 24 · b. ~1916 · Maryland
★ You are viewing this record
Sibling
Vivian Mccormick
Sibling · 1940 · age 20
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 — Frederick-County, Maryland
Open full size
1940 US Federal Census — Frederick-County, Maryland
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01549-00653)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John Carey | 58 | Head | Machinist | Maryland |
| 2 | Louise O Carey | 60 | Wife | — | Pennsylvania |
| 4 | Forrest Miller | 41 | Head | Owner | Maryland |
| 5 | Helen Miller | 34 | Wife | — | Virginia |
| 6 | Robert Miller | 12 | Son | — | Maryland |
| 7 | Jacqueline Miller | 10 | Daughter | — | Maryland |
| 8 | Forrest Jr. Miller | 8 | Son | — | Maryland |
| 9 | Ruth Hovermill | 39 | Head | — | West Virginia |
| 10 | Mae Hovermill | 20 | Daughter | — | West Virginia |
| 11 | Grover Cornelius | 47 | Lodger | Hostler | Maryland |
| 12 | Edgar Harmon | 45 | Head | Clerk | Maryland |
| 13 | Nora Harmon | 46 | Wife | — | West Virginia |
| 14 | Gerald Harmon | 11 | Son | — | Maryland |
| 15 | Helen Harmon | 7 | Daughter | — | Maryland |
| 16 | William Cornelius | 27 | Head | Brakeman | Maryland |
| 17 | Mildred Cornelius | 21 | Wife | — | Maryland |
| 18 | Wayne Cornelius | 2 | Son | — | Maryland |
| 19 | Charles Cornelius | 29 | Head | — | Maryland |
| 20 | Helen Cornelius | 21 | Wife | Blouse | Maryland |
| 21 | Lewis Cornelius | 55 | Head | Hostler | Maryland |
| 22 | Daisy Cornelius | 53 | Wife | — | Virginia |
| 23 | Lester Cornelius | 21 | Son | Coachman | Maryland |
| 24 | Gloria Cornelius | 18 | Daughter | — | Maryland |
| 25 | Betty Cornelius | 15 | Daughter | — | Maryland |
| 26 | James Mccormick | 53 | Head | Brakeman | Pennsylvania |
| 27 | Lyna Mccormick | 53 | Wife | Owner | Maryland |
| 28 | James Mccormick THIS PERSON | 24 | Son | Apprentice | Maryland |
| 29 | Vivian Mccormick | 20 | Daughter | — | Maryland |
| 30 | Addie Harner | 42 | Head | Floor Lady | Maryland |
| 31 | Frankie Harner | 14 | Son | Clerk | Maryland |
| 32 | Ralph Thomas | 29 | Head | Brakeman | Maryland |
| 33 | Eldora Thomas | 23 | Wife | — | Maryland |
| 34 | Ralph Jr. Thomas | 6 | Son | — | Maryland |
| 35 | Raymond Metzer | 32 | Head | Carman | Maryland |
| 36 | Emelia Metzer | 30 | Wife | — | New York |
| 37 | Clarence Michael | 40 | Head | Repairman | Maryland |
| 38 | Maude Michael | 40 | Wife | — | Virginia |
| 39 | Doris Michael | 18 | Daughter | — | Maryland |
| 40 | Catherine Michael | 15 | Daughter | — | Maryland |
Pedigree Summary
James + 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)