MF
Mary Frederick — 1920 US Census Record
Linked across censuses1920 United States Federal Census · New York, New York
Our Model Tree links this Mary Frederick across the 1920, 1930 and 1940 US Censuses in New York, New York (XGBoost, ~Confirmed) — first a head (b.~1862), then head of a 9-person household.
Age 58
b. ~1862
Female
Head
Born: New York
Widowed
1920 Census Record Details
| Census Year | 1920 |
| Location | New York, New York |
| Surname | Frederick |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 58 |
| Marital Status | Widowed |
| Birthplace | New York |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Occupation | Housewife |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Occupation | Housewife |
| Township / Ward | New York City |
| Est. Birth Year | ~1862 |
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.
9 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Harry Frederick | Son | — | 21 | ~1899 |
| Philip Holloway | Other | — | 43 | ~1877 |
| Edward Frederick | Son | — | 32 | ~1888 |
| Mary Frederick | Head | — | 58 | ~1862 |
| Albert Gruney | Other | — | 25 | ~1895 |
| George Spencer | Other | — | 55 | ~1865 |
| John Frederick | Son | — | 24 | ~1896 |
| Francis Frederick | Son | — | 27 | ~1893 |
| Louis Specht | Other | — | 28 | ~1892 |
Census Appearances
1920
New York, …
Head, age 58
New York, New York · implied b. ~1862 — 9 household members
| Surname | Frederick |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 58 |
| Marital Status | Widowed |
| Birthplace | New York |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Housewife |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1930
New York, …
Other, age 70
New York, New York · implied b. ~1860 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Frederick |
| Given Name | Mary |
| Relationship to Head | Mother-in-law |
| Sex | F |
| Color / Race | White |
| Age | 70 |
| Marital Status | Widowed |
| Birthplace | New York |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
New-York-County, New …
Head, age 80
New-York-County, New York · implied b. ~1860
●
Primary link
· ~Confirmed · 1 source
XGBoost
| Surname | FREDERICKS |
| Given Name | MARY |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 80 |
| Marital Status | Widowed |
| Birthplace | New York |
| 1935 Residence (City) | New York |
| 1935 Residence (County) | New York |
| Income (1939) | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
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 Mary Frederick across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Frederick
Head · 1920 · age 58 · b. ~1862 · New York
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1920 US Federal Census — New York, New York
Open full size
1920 US Federal Census — New York, New York
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu1221unit:0393)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Joshua Eisenhut | 26 | Lodger | Manager | Illinois |
| 52 | George Eisenhut | 40 | Husband | Steward | Hungary |
| 53 | Romney G. Hansen | 32 | Lodger | Benefactor | Nebraska |
| 54 | Samuel M. Hall | 42 | Lodger | Printer | Missouri |
| 55 | Alfred Gerhardi | 26 | Lodger | Clerk | Switzerland |
| 56 | William H. Wilkinson | 44 | Roomer | Musician | Indiana |
| 57 | Louisa Wolf | 20 | Lodger | Nurse | New York |
| 58 | Benjamin Roth | 38 | Lodger | Cigar Maker | Hungary |
| 59 | Edward Mckeyes | 38 | Lodger | Clerk | New York |
| 60 | Thomas S. Gullinder | 44 | Roomer | Collector | New York |
| 61 | Albert Kramer | 34 | Boarder | Counterman | Germany |
| 62 | Alice M. Lovett | 41 | Head | Housework | Canada |
| 63 | Dorothy G. Lovett | 17 | Daughter | Machine Operator | New York |
| 64 | Theresa G. Lovett | 13 | Daughter | School | New York |
| 65 | Henry P. Lovett | 11 | Son | School | New York |
| 66 | William R. Tesch | 65 | Head | Tailor | Germany |
| 67 | Ned Carl Tesch | 36 | Son | Stock Clerk | England |
| 68 | John L. Mortimer | 42 | Head | Fireman - Stationary | New York |
| 69 | Anna Mortimer | 45 | Wife | Housewife | Maryland |
| 70 | Victor Baar | 50 | Lodger | Clerk | Belgium |
| 71 | Martin A. Bussell | 32 | Roomer | Clerk | New York |
| 72 | Ovidie E. Henkson | 25 | Lodger | Electrician | Indiana |
| 73 | Frank Hyps | 31 | Lodger | Laborer | Missouri |
| 74 | William Corson | 31 | Lodger | Metal Worker | England |
| 75 | Theresa Carr | 28 | Lodger | Housework | New York |
| 76 | Mary Hovey | 49 | Head | Saleslady | Ireland |
| 77 | Ella G. Hovey | 26 | Sister | Stenographer | New York |
| 78 | Mary Frederick THIS PERSON | 58 | Head | Housewife | New York |
| 79 | Edward J. Frederick | 32 | Son | Fireman | New Jersey |
| 80 | John W. Frederick | 24 | Son | Clerk | New Jersey |
| 81 | Francis W. Frederick | 27 | Son | Clerk | New Jersey |
| 82 | Harry J. Frederick | 21 | Son | Mechanic | New York |
| 83 | George Spencer | 55 | Lodger | Conductor | New York |
| 84 | Philip Holloway | 43 | Lodger | Translator | England |
| 85 | Albert Gruney | 25 | Lodger | Cook | Switzerland |
| 86 | Louis J. Specht | 28 | Lodger | Millwright | Germany |
| 87 | Cecil J. Johnson | 30 | Head | Laborer | Illinois |
| 88 | Leon W. Russell | 24 | Lodger | Telephone Installer | New York |
| 89 | Thomas Monaghan | 54 | Head | Engineer | Ireland |
| 90 | Mary Monaghan | 52 | Wife | Housewife | Ireland |
| 91 | Andrew J. Monaghan | 24 | Son | Mechanic | Pennsylvania |
| 92 | Jesse Katz | 39 | Head | Clerk | New York |
| 93 | Milton Katz | 35 | Brother | Salesman | New York |
| 94 | Hannah Katz | 33 | Sister | Housewife | New York |
| 95 | Joshua Katz | 30 | Brother | Bronze Packer | New York |
| 96 | Robert H. Speer | 46 | Head | Chauffeur | New York |
| 97 | Thomas J. Speer | 26 | Son | Chauffeur | New York |
| 98 | Frances M. Speer | 25 | Daughter | Stenographer | New York |
| 99 | John Callaghan | 75 | Father | Retired | Ireland |
| 100 | Rose Campbell | 28 | Boarder | Designer | New York |
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)