ML
Mary Leach — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Duval-County, Florida
Our Model Tree links this Mary Leach across the 1930 and 1940 US Censuses in Duval-County, Florida (XGBoost, ~Confirmed) — first a spouse (b.~1876), then head of a 7-person household.
Age 64
b. ~1876
Female
Spouse
Born: Georgia
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Duval-County, Florida |
| Surname | Leach |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 64 |
| Marital Status | Married |
| Birthplace | Georgia |
| 1935 Residence (City) | Jacksonville |
| 1935 Residence (County) | Duval |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same home |
| Birth State | Georgia |
| Birth Country | United States |
| Birthplace (normalized) | georgia |
| Township / Ward | Jacksonville |
| Est. Birth Year | ~1876 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Alfred Leach | Head | — | 67 | ~1873 |
| Edgar Hammond | Other | — | 31 | ~1909 |
| George Leach | Daughter | — | 30 | ~1910 |
| Mollie Leach | Other | — | 27 | ~1913 |
| Mary Leach | Spouse | — | 64 | ~1876 |
| Edgar Hammond | Other | — | 7 | ~1933 |
| Gloria Leach | Other | — | 2 | ~1938 |
Census Appearances
1930
Duval, Florida
Spouse, age 53
Duval, Florida · implied b. ~1877 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leach |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 53 |
| Marital Status | Married |
| Birthplace | Georgia |
| Age at First Marriage | 19 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Georgia |
| Can Read/Write | Yes |
| Birth State | Georgia |
| Birth Country | United States |
| Birthplace (normalized) | georgia |
1940
Duval-County, Florida
Spouse, age 64
Duval-County, Florida · implied b. ~1876 — 7 household members
| Surname | Leach |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 64 |
| Marital Status | Married |
| Birthplace | Georgia |
| 1935 Residence (City) | Jacksonville |
| 1935 Residence (County) | Duval |
| Highest Grade | No 8 |
| 1935 Residence | Same home |
| Birth State | Georgia |
| Birth Country | United States |
| Birthplace (normalized) | georgia |
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 Leach across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Leach
Spouse · 1940 · age 64 · b. ~1876 · Florida
★ 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 — Duval-County, Florida
Open full size
1940 US Federal Census — Duval-County, Florida
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-00623-00656)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Jack Hopkins | 60 | Father-in-law | Salesman | Georgia |
| 42 | Laura Smith Hopkins | 52 | Mother-in-law | Nurse | N. Carolina |
| 43 | Jasper Mifons | 48 | Head | Salesman | Florida |
| 44 | Mildred Mifons | 47 | Wife | — | Georgia |
| 45 | Jasper Jr. Mifons | 17 | Son | — | Florida |
| 46 | Edward Mifons | 14 | Son | — | Florida |
| 47 | Mary Mifons | 10 | Daughter | — | Florida |
| 48 | Robert Mifons | 4 | Son | — | Florida |
| 49 | James Cortes | 44 | Head | Truck Driver | Georgia |
| 50 | Nina Cortes | 46 | Wife | — | Florida |
| 51 | Claude Cortes | 14 | Son | — | Georgia |
| 52 | Sara Cortes | 12 | Daughter | — | Georgia |
| 53 | Paul Cortes | 5 | Son | — | Georgia |
| 54 | Martin Cortes | 3 | Son | — | Georgia |
| 55 | James F. Smith | 42 | Brother-in-law | Cigar Maker | Florida |
| 56 | Benjamin Campillo | 52 | Head | Manager | Spain |
| 57 | Asuncion Campillo | 50 | Wife | Cigar Bander | Spain |
| 58 | Jose Garcia | 42 | Son-in-law | Cigar Maker | Spain |
| 59 | Honora Garcia | 35 | Daughter | Cigar Maker | Spain |
| 60 | Jose Jr. Garcia | 13 | Grandson | — | Florida |
| 61 | Rosa Garcia | 4 | Granddaughter | — | Florida |
| 62 | Alfred M. Leach | 67 | Head | Chief Engineer | S. Carolina |
| 63 | Mary Leach THIS PERSON | 64 | Wife | — | Georgia |
| 64 | George Leach | 30 | Daughter | Spec. Machine Op. | Georgia |
| 65 | Mollie Louise Leach | 27 | Daughter-in-law | — | Georgia |
| 66 | Gloria Shirley Leach | 2 | Granddaughter | — | Florida |
| 67 | Edgar S. Hammond | 31 | Boarder | Proprietor | Indiana |
| 68 | Edgar Jr. Hammond | 7 | Boarder | — | Florida |
| 69 | Roy Mckinsey | 50 | Head | Truck Driver | Georgia |
| 70 | Leila Mckinsey | 41 | Wife | Seamstress | Georgia |
| 71 | Bernice Garner | 21 | Daughter | — | Georgia |
| 72 | Alva Garner | 3 | Grandson | — | Florida |
| 73 | Florence Berger | 40 | Head | — | New York |
| 74 | Theodore Modert | 19 | Son | Laborer | Pennsylvania |
| 75 | James Modert | 15 | Son | — | New Jersey |
| 76 | Marie Coster | 22 | Daughter | New Worker | New Jersey |
| 77 | Vince Marie Coster | 9 | Granddaughter | — | Florida |
| 78 | Jessie Mckeever | 49 | Head | Promoter | Rhode Island |
| 79 | Leon Masters | 25 | Son | — | Florida |
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)