JA
James Arnold — 1940 US Census Record
Model Tree available1940 United States Federal Census · Baltimore-City-County, Maryland
Our Model Tree links this James Arnold across the 1920, 1930 and 1940 US Censuses in Baltimore-City-County, Maryland (XGBoost, ~Confirmed), with identified parents Mathew & Martha — first a son (b.~1919), then head of a 4-person household.
Age 21
b. ~1919
Male
Son
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-City-County, Maryland |
| Surname | Arnold |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Additional Details | |
| Occupation | Laborer |
| Industry | Park project |
| Class of Worker | GW |
| Hours Worked | 12 |
| Income (1939) | 600 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Laborer |
| Township / Ward | Baltimore City |
| 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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Martha Arnold | Head | — | 66 | ~1874 |
| Charles Anson | Other | — | 40 | ~1900 |
| John Morris | Other | — | 59 | ~1881 |
| James Arnold | Son | — | 21 | ~1919 |
Census Appearances
1920
Baltimore, Maryland
Son, age 1
Baltimore, Maryland · implied b. ~1919 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Arnold |
| Given Name | James Jr |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Baltimore, Maryland
Son, age 11
Baltimore, Maryland · implied b. ~1919 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Arnold |
| Given Name | James F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| 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
Baltimore-City-County, Maryland
Son, age 21
Baltimore-City-County, Maryland · implied b. ~1919 — 4 household members
| Surname | Arnold |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Occupation | Laborer |
| Industry | Park project |
| Class of Worker | GW |
| Hours Worked | 12 |
| Income (1939) | 600 |
| 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 James Arnold across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Mathew Arnold (~0.92 confidence) and mother Martha Arnold (~0.92 confidence) and father James Arnold (~0.92 confidence) and mother Jessie Arnold (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Mathew Arnold
b. ~1871
Source father
● Household
· direct · ~0.92
Mother
Martha Arnold
b. ~1874
Source mother
● Household
· direct · ~0.92
Father
James Arnold
b. ~1896
Source father
● Household
· direct · ~0.92
Mother
Jessie Arnold
b. ~1900
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Arnold
Son · 1940 · age 21 · b. ~1919 · 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 — 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-t0627-01535-00920)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Bernard Daniels | 63 | Head | Engineer | Penna |
| 2 | Mary G. Daniels | 60 | Wife | — | Delaware |
| 3 | Rose Seymour | 12 | Granddaughter | — | Maryland |
| 4 | John L. Cannoy | 57 | Head | Furniture Polisher | Maryland |
| 5 | Mattie Cannoy | 73 | Mother | — | Virginia |
| 6 | John Cannoy | 34 | Grandson | Press Operator | Maryland |
| 7 | Paul County | 39 | Head | Patrolman | Maryland |
| 8 | Helen County | 32 | Wife | — | Maryland |
| 9 | John T. Johnson | 46 | Head | Iron Worker | Maryland |
| 10 | Rose E. Johnson | 35 | Wife | — | Maryland |
| 11 | Jean Johnson | 9 | Daughter | — | Maryland |
| 12 | George Johnson | 6 | Son | — | Maryland |
| 13 | Lawrence Johnson | 0 | Son | — | Maryland |
| 14 | Richard Johnson | 40 | Brother | Brakeman | Maryland |
| 15 | John T. Cook | 41 | Head | Burner | Penna |
| 16 | Anna Cook | 39 | Wife | — | Maryland |
| 17 | Mary E. Cook | 16 | Daughter | — | Maryland |
| 18 | Emma Barese | 49 | Head | Housewife | Maryland |
| 19 | Gertrude Cornelius | 23 | Daughter | Laborer | Conn |
| 20 | John Wagner | 43 | Boarder | Painter | Maryland |
| 21 | Joseph Johnson | 22 | Son-in-law | Iron Worker | Maryland |
| 22 | Nancy Johnson | 18 | Wife | — | Maryland |
| 23 | Anna M. Barese | 4 | Granddaughter | — | Maryland |
| 24 | Martha Arnold | 66 | Head | — | Maryland |
| 25 | James Arnold THIS PERSON | 21 | Son | Laborer | Maryland |
| 26 | John A. Morris | 59 | Brother | Laborer | Maryland |
| 27 | Charles Anson | 40 | Lodger | Salesman | Maryland |
| 28 | Helen Lang | 23 | Head | — | Maryland |
| 29 | Helen Stalling | 6 | Daughter | — | Maryland |
| 30 | Albert Mongon | 13 | Cousin | — | Maryland |
| 31 | Fernan Mongon | 11 | Cousin | — | Maryland |
| 32 | Jack Mongon | 9 | Cousin | — | Maryland |
| 33 | William Wilking | 26 | Boarder | Laborer | Maryland |
| 34 | John Carter | 22 | Boarder | Laborer | Maryland |
| 35 | Mary E. Carter | 20 | Boarder | — | Maryland |
| 36 | Lillian Sabbowski | 15 | Boarder | — | Maryland |
| 37 | William Burke | 28 | Head | Chauffeur | Maryland |
| 38 | William Jr. Burke | 8 | Son | — | Maryland |
| 39 | Joseph Burke | 7 | Son | — | Maryland |
| 40 | John Young | 31 | Head | Chauffeur | Maryland |
Pedigree Summary
James
Gen 1 · 4 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)