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John Mcclain — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Baltimore-City-County, Maryland
Our Model Tree links this John Mcclain across the 1930 and 1940 US Censuses in Baltimore-City-County, Maryland (XGBoost, ~Confirmed) — first a son (b.~1918), then head of a 6-person household.
Age 22
b. ~1918
Male
Son
Born: Pennsylvania
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-City-County, Maryland |
| Surname | McClain |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Additional Details | |
| Occupation | Helper |
| Industry | Transfer Co |
| Class of Worker | PW |
| Hours Worked | 15 |
| Income (1939) | 188 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Helper |
| Township / Ward | Baltimore City |
| Est. Birth Year | ~1918 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| James Mcclain | Head | — | 58 | ~1882 |
| John Mcclain | Son | — | 22 | ~1918 |
| Ruth Mcclain | Daughter | — | 16 | ~1924 |
| Robert Mcclain | Son | — | 28 | ~1912 |
| Lillian Mcclain | Spouse | — | 54 | ~1886 |
| Charles Mcclain | Son | — | 11 | ~1929 |
Census Appearances
1930
Baltimore, Maryland
Son, age 12
Baltimore, Maryland · implied b. ~1918 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McClain |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Baltimore-City-County, Maryland
Son, age 22
Baltimore-City-County, Maryland · implied b. ~1918 — 6 household members
| Surname | McClain |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Occupation | Helper |
| Industry | Transfer Co |
| Class of Worker | PW |
| Hours Worked | 15 |
| Income (1939) | 188 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 Mcclain across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Mcclain
Son · 1940 · age 22 · b. ~1918 · Maryland
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Sibling
Ruth Mcclain
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Mcclain
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Mcclain
Sibling · 1940 · age 28
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 — Baltimore-City-County, Maryland
Open full size
1940 US Federal Census — Baltimore-City-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01530-00517)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ina M. Houslip | 35 | Head | — | Virginia |
| 2 | Solomon Tyler | 70 | Head | — | Maryland |
| 3 | Mabel Tyler | 45 | Wife | — | Virginia |
| 4 | Isaac Siegel | 63 | Head | — | Russia |
| 5 | Sophia Siegel | 63 | Wife | — | Russia |
| 6 | Rebecca Siegel | 35 | Daughter | Stenographer | Russia |
| 7 | Anna Siegel | 31 | Daughter | Teacher | Russia |
| 8 | Miriam Siegel | 24 | Daughter | Typist | Maryland |
| 9 | Mildred Fryer | 39 | Head | — | Maryland |
| 10 | A. Cohen | 78 | Head | — | Russia |
| 11 | Dave Cohen | 53 | Son | — | Russia |
| 12 | Esther Cohen | 33 | Daughter | Inspirator | Maryland |
| 13 | Alma Dodson | 48 | Head | Hairdresser | Maryland |
| 14 | Lillian Russell | 24 | Head | Piston Ring Maker | Maryland |
| 15 | Catherine F. Wells | 49 | Housekeeper | — | Maryland |
| 16 | Paul E. Wells | 27 | Housekeeper's Son | Chauffeur | Maryland |
| 17 | Russell Beatty | 31 | Head | Laborer | Virginia |
| 18 | Jarrett Beatty | 22 | Wife | — | Virginia |
| 19 | Margaret Beatty | 2 | Daughter | — | Maryland |
| 20 | Theodore Beatty | 1 | Son | — | Virginia |
| 21 | William Hoff | 22 | Head | Crane Operator | Maryland |
| 22 | Flossie Hoff | 21 | Wife | — | Maryland |
| 23 | William 3Rd Hoff | 1 | Son | — | Maryland |
| 24 | Homer F. Orrell | 39 | Head | Welder | Maryland |
| 25 | Catherine Orrell | 34 | Wife | — | Pennsylvania |
| 26 | Nancy Orrell | 9 | Daughter | — | Maryland |
| 27 | Frank Bizzarri | 63 | Head | Tailor | Italy |
| 28 | Josephine Bizzarri | 50 | Wife | — | Virginia |
| 29 | Joseph Bizzarri | 25 | Son | Tailor | Maryland |
| 30 | Robert Bizzarri | 24 | Son | Tailor | Maryland |
| 31 | Theresa Bizzarri | 15 | Daughter | — | Maryland |
| 32 | William Bizzarri | 27 | Son | Laborer | Maryland |
| 33 | Gertrude Bizzarri | 22 | Daughter-in-law | Machine Operator | Maryland |
| 34 | James C. Mcclain | 58 | Head | Painter | Pennsylvania |
| 35 | Lillian Mcclain | 54 | Wife | — | Pennsylvania |
| 36 | Robert Mcclain | 28 | Son | Chauffeur | Pennsylvania |
| 37 | John Mcclain THIS PERSON | 22 | Son | Helper | Pennsylvania |
| 38 | Ruth Mcclain | 16 | Daughter | New Worker | Pennsylvania |
| 39 | Charles Mcclain | 11 | Son | — | Maryland |
| 40 | Denis Doenges | 47 | Head | — | Canada |
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)