JC
John Costello — 1920 US Census Record
Linked across censuses1920 United States Federal Census · Los Angeles, California
Our Model Tree links this John Costello across the 1910 and 1920 US Censuses in Los Angeles, California (XGBoost, ~Confirmed) — first a son (b.~1906), then head of a 8-person household.
Age 14
b. ~1906
Male
Son
Born: Illinois
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | Los Angeles, California |
| Surname | Costello |
| Given Name | John J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Kentucky |
| Additional Details | |
| Occupation | Messenger |
| Industry | Department Store |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Messenger |
| Township / Ward | Los Angeles City |
| Est. Birth Year | ~1906 |
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.
8 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Cecilia Costello | Daughter | — | 6 | ~1914 |
| James Costello | Son | — | 12 | ~1908 |
| Nellie Costello | Daughter | — | 16 | ~1904 |
| John Costello | Son | — | 14 | ~1906 |
| Ella Costello | Spouse | — | 41 | ~1879 |
| Marie Costello | Daughter | — | 9 | ~1911 |
| George Costello | Son | — | 3 | ~1917 |
| Patrick Costello | Head | — | 44 | ~1876 |
Census Appearances
1910
Los Angeles, …
Son, age 4
Los Angeles, California · implied b. ~1906 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Castillo |
| Given Name | Joseph |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Kentucky |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1920
Los Angeles, …
Son, age 14
Los Angeles, California · implied b. ~1906 — 8 household members
| Surname | Costello |
| Given Name | John J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Kentucky |
| Occupation | Messenger |
| Industry | Department Store |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 Costello across 2 US Census years (1910 and 1920) in Los Angeles, California, using XGBoost record linkage.
Show:
This person
Anchor record
John Costello
Son · 1920 · age 14 · b. ~1906 · California
★ You are viewing this record
Sibling
Cecilia Costello
Sibling · 1920 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Costello
Sibling · 1920 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marie Costello
Sibling · 1920 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Nellie Costello
Sibling · 1920 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Costello
Sibling · 1920 · age 12
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
1920 US Federal Census — Los Angeles, California
Open full size
1920 US Federal Census — Los Angeles, California
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu114unit:0269)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Frank A. Chamberlain | 68 | Head | Claim Clerk | Illinois |
| 2 | Minnie Chamberlain | 58 | Wife | — | Iowa |
| 3 | Alice Knight | 41 | Private Sec | Stenographer | Ohio |
| 4 | John T. Simms | 46 | Head | Shoemaker | Pennsylvania |
| 5 | Nellie C. Simms | 32 | Wife | — | Minnesota |
| 6 | John S. Simms | 15 | Son | — | California |
| 7 | Barbara R. Simms | 6 | Dau | — | California |
| 8 | Nellie L. Sexton | 40 | Head | Stenographer | Tennessee |
| 9 | Emma J. Mcintosh | 78 | Mother | — | Virginia |
| 10 | Charles A. Tyree | 50 | Brother-in-law | Painter | Tennessee |
| 11 | Florence L. Tyree | 47 | Sister | — | Tennessee |
| 12 | Robert L. Tyree | 11 | Nephew | Apprentice | Tennessee |
| 13 | Richard Tyree | 12 | Nephew | — | Tennessee |
| 14 | John T. Tyree | 9 | Nephew | — | Tennessee |
| 15 | Cyrus L. Tyree | 7 | Nephew | — | Tennessee |
| 16 | Nicola Arcaro | 31 | Head | Machinist | Italy |
| 17 | Rose Arcaro | 27 | Wife | — | California |
| 18 | Mayme Arcaro | 2 | Daughter | — | California |
| 19 | Hal T. Farley | 46 | Head | Conductor | Missouri |
| 20 | Ida T. Farley | 52 | Wife | — | Indiana |
| 21 | Paul L. Farley | 12 | Son | — | California |
| 22 | William Douthit | 44 | Head | Motorman | Missouri |
| 23 | Mollie E. Douthit | 44 | Wife | — | Tennessee |
| 24 | Margaret Douthit | 12 | Daughter | — | Missouri |
| 25 | Catherine R. Hurlbert | 54 | Head | — | Tennessee |
| 26 | Robert A. Williams | 29 | Son | Carpenter | New Hampshire |
| 27 | William H. Mcfaul | 48 | Head | — | Tennessee |
| 28 | Dovie D. Mcfaul | 43 | Wife | Supt. Station | Texas |
| 29 | Fay A. Mcfaul | 20 | Daughter | Instructress | Texas |
| 30 | Fred J. Sr. Swanson | 38 | Head | Salesman | Minnesota |
| 31 | Winifred Swanson | 34 | Wife | — | Missouri |
| 32 | Fred J. Jr. Swanson | 2 | Son | — | California |
| 33 | John H. Knight | 37 | Head | Minister | Canada |
| 34 | Rosa A. Knight | 29 | Wife | — | Kansas |
| 35 | Wanda Knight | 8 | Daughter | — | Washington |
| 36 | Alice Knight | 6 | Daughter | — | Washington |
| 37 | George Knight | 4 | Son | — | Washington |
| 38 | Bobby Knight | 2 | Daughter | — | California |
| 39 | Patrick J. Costello | 44 | Head | Accountant | Illinois |
| 40 | Ella Costello | 41 | Wife | — | Kentucky |
| 41 | Nellie A. Costello | 16 | Daughter | Steno | Illinois |
| 42 | John J. Costello THIS PERSON | 14 | Son | Messenger | Illinois |
| 43 | James J. Costello | 12 | Son | — | California |
| 44 | Marie Costello | 9 | Daughter | — | California |
| 45 | Cecilia Costello | 6 | Daughter | — | California |
| 46 | George Costello | 3 | Son | — | California |
| 47 | James W. Duffy | 54 | Head | Painter | Pennsylvania |
| 48 | Sarah S. Duffy | 55 | Wife | — | Pennsylvania |
| 49 | James W. Jr. Duffy | 19 | Son | — | California |
| 50 | Verna M. Duffy | 16 | Daughter | — | Pennsylvania |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1920 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)