MF
Mary Frederick — 1920 US Census Record
Linked across censuses1920 United States Federal Census · St Martin, Louisiana
Our Model Tree links this Mary Frederick across the 1920 and 1930 US Censuses in St Martin, Louisiana (XGBoost, ~Confirmed) — first a daughter (b.~1917), then head of a 9-person household.
Age 3
b. ~1917
Female
Daughter
Born: Louisiana
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | St Martin, Louisiana |
| Surname | Frederick |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Louisiana |
| Father's Birthplace | Louisiana |
| Mother's Birthplace | Louisiana |
| Additional Details | |
| Can Read | No |
| Can Write | No |
| Speaks English | Yes |
| Birth State | Louisiana |
| Birth Country | United States |
| Birthplace (normalized) | louisiana |
| Township / Ward | St Martin Parish 5Th Ward |
| Est. Birth Year | ~1917 |
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 |
|---|---|---|---|---|
| Annie Frederick | Daughter | — | 13 | ~1907 |
| Mary Frederick | Daughter | — | 3 | ~1917 |
| Cecile Frederick | Daughter | — | 9 | ~1911 |
| Francois Frederick | Head | — | 37 | ~1883 |
| Luke Frederick | Son | — | 11 | ~1909 |
| Mathilda Frederick | Daughter | — | 12 | ~1908 |
| Marie Frederick | Spouse | — | 32 | ~1888 |
| Ellie Frederick | Daughter | — | ~1920 | |
| Judith Frederick | Daughter | — | 4 | ~1916 |
Census Appearances
1920
St Martin, …
Daughter, age 3
St Martin, Louisiana · implied b. ~1917 — 9 household members
| Surname | Frederick |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Louisiana |
| Father's Birthplace | Louisiana |
| Mother's Birthplace | Louisiana |
| Can Read | No |
| Can Write | No |
| Speaks English | Yes |
| Birth State | Louisiana |
| Birth Country | United States |
| Birthplace (normalized) | louisiana |
1930
St Martin, …
Daughter, age 13
St Martin, Louisiana · implied b. ~1917 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Frederic |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Louisiana |
| Father's Birthplace | Louisiana |
| Mother's Birthplace | Louisiana |
| Can Read/Write | Yes |
| Birth State | Louisiana |
| Birth Country | United States |
| Birthplace (normalized) | louisiana |
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 2 US Census years (1920 and 1930) in St Martin, Louisiana, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Frederick
Daughter · 1920 · age 3 · b. ~1917 · Louisiana
★ You are viewing this record
Sibling
Mathilda Frederick
Sibling · 1920 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Cecile Frederick
Sibling · 1920 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ellie Frederick
Sibling · 1920 · age
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Luke Frederick
Sibling · 1920 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Judith Frederick
Sibling · 1920 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Annie Frederick
Sibling · 1920 · age 13
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 — St Martin, Louisiana
Open full size
1920 US Federal Census — St Martin, Louisiana
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu631unit:0366)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Berthance Moreau | 41 | Head | Farmer | Louisiana |
| 2 | Marie Moreau | 36 | Wife | — | Louisiana |
| 3 | Beulah Moreau | 13 | Daughter | — | Louisiana |
| 4 | Bella Moreau | 11 | Daughter | — | Louisiana |
| 5 | Adella Moreau | 7 | Daughter | — | Louisiana |
| 6 | Regina Moreau | 6 | Daughter | — | Louisiana |
| 7 | Agnes Moreau | 5 | Daughter | — | Louisiana |
| 8 | Placide Moreau | 4 | Son | — | Louisiana |
| 9 | John Kidder | 28 | Head | Farmer | Louisiana |
| 10 | Louise Kidder | 27 | Wife | — | Louisiana |
| 11 | Francis Kidder | 6 | Daughter | — | Louisiana |
| 12 | Demetrius Kidder | 5 | Daughter | — | Louisiana |
| 13 | Espazie Kidder | 4 | Daughter | — | Louisiana |
| 14 | Evariste Kidder | 39 | Head | Farmer | Louisiana |
| 15 | Irma Kidder | 44 | Wife | — | Louisiana |
| 16 | Blanche Kidder | 17 | Daughter | — | Louisiana |
| 17 | Sidney Kidder | 16 | Son | Farm Lab | Louisiana |
| 18 | Edwin Kidder | 14 | Son | — | Louisiana |
| 19 | Francois Frederick | 37 | Head | Farmer | Louisiana |
| 20 | Marie Frederick | 32 | Wife | — | Louisiana |
| 21 | Annie Frederick | 13 | Daughter | — | Louisiana |
| 22 | Mathilda Frederick | 12 | Daughter | — | Louisiana |
| 23 | Luke Frederick | 11 | Son | — | Louisiana |
| 24 | Cecile Frederick | 9 | Daughter | — | Louisiana |
| 25 | Judith Frederick | 4 | Daughter | — | Louisiana |
| 26 | Mary Frederick THIS PERSON | 3 | Daughter | — | Louisiana |
| 27 | Ellie Frederick | 0 | Daughter | — | Louisiana |
| 28 | Jean Bte Moreau | 37 | Head | Farmer | Louisiana |
| 29 | Amelie Moreau | 36 | Wife | — | Louisiana |
| 30 | Joseph Moreau | 17 | Son | Farm Lab | Louisiana |
| 31 | Eloy Moreau | 14 | Son | — | Louisiana |
| 32 | Antheal Moreau | 9 | Son | — | Louisiana |
| 33 | Isaac Moreau | 4 | Son | — | Louisiana |
| 34 | Telesphor Kidder | 29 | Head | Farmer | Louisiana |
| 35 | Sandy Travesia Kidder | 26 | Wife | — | Louisiana |
| 36 | Kidder | 1 | Son | — | Louisiana |
| 37 | Wallace Kidder | 3 | Son | — | Louisiana |
| 38 | Evelyn Kidder | 7 | Daughter | — | Louisiana |
| 39 | Louise Kidder | 4 | Daughter | — | Louisiana |
| 40 | Louis Kidder | 72 | Head | — | Louisiana |
| 41 | Louisa Kidder | 68 | Wife | — | Louisiana |
| 42 | Noé Kidder | 24 | Head | Farmer | Louisiana |
| 43 | Agatha Kidder | 21 | Wife | — | Louisiana |
| 44 | Sadie Kidder | 5 | Daughter | — | Louisiana |
| 45 | Onesime Kidder | 4 | Son | — | Louisiana |
| 46 | Wilson Kidder | 2 | Son | — | Louisiana |
| 47 | Alexandre Moreau | 38 | Head | Farmer | Louisiana |
| 48 | Olivia Moreau | 37 | Wife | — | Louisiana |
| 49 | Eugenie Moreau | 17 | Daughter | — | Louisiana |
| 50 | Thelma Moreau | 15 | Daughter | — | Louisiana |
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)