WM
William Mahoney — 1920 US Census Record
Model Tree available1920 United States Federal Census · Baltimore, Maryland
Our Model Tree links this William Mahoney across the 1920, 1930 and 1940 US Censuses in Baltimore, Maryland (XGBoost, ~Confirmed), with identified parents E & Edward — first a son (b.~1907), then head of a 10-person household.
Age 13
b. ~1907
Male
Son
Born: Maryland
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | Baltimore, Maryland |
| Surname | Mahoney |
| Given Name | William H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Additional Details | |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | 15Th District Part Of 1St Precinct Sparrows Point |
| Est. Birth Year | ~1907 |
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.
10 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Edgar Mahoney | Son | — | 22 | ~1898 |
| Charles Mahoney | Son | — | 6 | ~1914 |
| William Mahoney | Son | — | 13 | ~1907 |
| E Mahoney | Head | — | 44 | ~1876 |
| Bessie Mahoney | Spouse | — | 43 | ~1877 |
| Elizabeth Mahoney | Daughter | — | 16 | ~1904 |
| Mary Mahoney | Daughter | — | 18 | ~1902 |
| Bertha Mahoney | Daughter | — | 9 | ~1911 |
| Helen Mahoney | Daughter | — | 11 | ~1909 |
| Isaac Mahoney | Son | — | 20 | ~1900 |
Census Appearances
1920
Baltimore, Maryland
Son, age 13
Baltimore, Maryland · implied b. ~1907 — 10 household members
| Surname | Mahoney |
| Given Name | William H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Baltimore, Maryland
Son, age 23
Baltimore, Maryland · implied b. ~1907 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mahany |
| Given Name | William A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Maryland |
| Age at First Marriage | 23 |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | teacher |
| Industry | public school |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | No |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-County, Maryland
Head, age 33
Baltimore-County, Maryland · implied b. ~1907 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mahaney |
| Given Name | William H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Towson |
| 1935 Residence (County) | Baltimore |
| Occupation | Teacher |
| Industry | public school |
| Class of Worker | GW |
| Hours Worked | 30 |
| Income (1939) | 1900 |
| Highest Grade | H-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 William Mahoney across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father E Mahoney (~0.92 confidence) and father Edward Mahany (~0.92 confidence) and mother Bertha Mahany (~0.92 confidence) and mother Bessie Mahoney (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
E Mahoney
b. ~1876
Source father
● Household
· direct · ~0.92
Father
Edward Mahany
b. ~1876
Source father
● Household
· direct · ~0.92
Mother
Bertha Mahany
b. ~1877
Source mother
● Household
· direct · ~0.92
Mother
Bessie Mahoney
b. ~1877
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Mahoney
Son · 1920 · age 13 · b. ~1907 · Maryland
★ You are viewing this record
Sibling
Mary Mahoney
Sibling · 1920 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Mahoney
Sibling · 1920 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bertha Mahoney
Sibling · 1920 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edgar Mahoney
Sibling · 1920 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Mahoney
Sibling · 1920 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Mahoney
Sibling · 1920 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Isaac Mahoney
Sibling · 1920 · 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
1920 US Federal Census — Baltimore, Maryland
Open full size
1920 US Federal Census — Baltimore, Maryland
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu655unit:0830)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John V. Forsythe | 4 | Son | — | Maryland |
| 2 | Helen I. Forsythe | 2 | Daughter | — | Maryland |
| 3 | John Jensen | 51 | Father-in-law | Millwright | Pennsylvania |
| 4 | Thomas A. Bunn | 32 | Head | Fireman | Maryland |
| 5 | Carrie E. Bunn | 29 | Wife | Teacher | Maryland |
| 6 | Neal A. Bunn | 27 | Brother | Laborer | Maryland |
| 7 | Shereden Snively | 33 | Head | Moulder | Pennsylvania |
| 8 | Pearl Snively | 29 | Wife | — | Pennsylvania |
| 9 | Ray C. Snively | 11 | Son | — | Maryland |
| 10 | Evelyn Snively | 9 | Daughter | — | Maryland |
| 11 | Lester Snively | 7 | Son | — | Maryland |
| 12 | Lucille Snively | 4 | Daughter | — | Maryland |
| 13 | John H. Rowe | 59 | Father-in-law | Boilermaker | Pennsylvania |
| 14 | Guy B. Rowe | 23 | Brother-in-law | Heater | Pennsylvania |
| 15 | William H. Lindeman | 62 | Head | Carpenter Helper | Maryland |
| 16 | Annie Lindeman | 58 | Wife | — | New York |
| 17 | Margaret Lindeman | 25 | Daughter | Stenographer | Maryland |
| 18 | Edith Lindeman | 24 | Daughter | Typist Clerk | Maryland |
| 19 | William B. Lindeman | 21 | Son | Riveter | Maryland |
| 20 | Margaret Lindeman | 18 | Daughter-in-law | — | Maryland |
| 21 | Lester R. Lindeman | 19 | Son | Draftsman | Maryland |
| 22 | Gertrude Lindeman | 17 | Daughter | — | Maryland |
| 23 | William H. Dennis | 45 | Head | Engineer Sta. | Maryland |
| 24 | Martha Dennis | 43 | Wife | — | Maryland |
| 25 | Robert Dennis | 20 | Son | Electrician | Maryland |
| 26 | Thomas Dennis | 18 | Son | Apprentice | Maryland |
| 27 | Edna Dennis | 16 | Daughter | — | Maryland |
| 28 | Elsie Dennis | 13 | Daughter | — | Maryland |
| 29 | George Dennis | 10 | Son | — | Maryland |
| 30 | Joseph Cotter | 38 | Boarder | Blacksmith Helper | Ireland |
| 31 | Walter F. Hoover | 42 | Head | Blacksmith | Maryland |
| 32 | Viola L. Hoover | 36 | Wife | — | Maryland |
| 33 | Samuel H. Hoover | 16 | Son | — | Maryland |
| 34 | Walter H. Hoover | 14 | Son | — | Maryland |
| 35 | Albert Lannifeer | 48 | Lodger | Bricklayer | England |
| 36 | Ward Layton | 20 | Boarder | Laborer | Virginia |
| 37 | Isaac W. Oliver | 60 | Head | Tool Keeper | Virginia |
| 38 | Sarah J. Oliver | 57 | Wife | — | Pennsylvania |
| 39 | John H. Oliver | 51 | Brother | Air Man | Virginia |
| 40 | Melvin Long | 23 | Boarder | Machinist Helper | Maryland |
| 41 | E. William Mahoney | 44 | Head | Plate Setter | Pennsylvania |
| 42 | Bessie M. Mahoney | 43 | Wife | — | Pennsylvania |
| 43 | Edgar Mahoney | 22 | Son | Rivet Tester | Maryland |
| 44 | Isaac A. Mahoney | 20 | Son | — | Maryland |
| 45 | Mary E. Mahoney | 18 | Daughter | Ledger Clerk | Maryland |
| 46 | Elizabeth A. Mahoney | 16 | Daughter | Charge Clerk | Maryland |
| 47 | William H. Mahoney THIS PERSON | 13 | Son | — | Maryland |
| 48 | Helen F. Mahoney | 11 | Daughter | — | Maryland |
| 49 | Bertha E. Mahoney | 9 | Daughter | — | Maryland |
| 50 | Charles A. Mahoney | 6 | Son | — | Maryland |
Pedigree Summary
William + 7 siblings
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 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)