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Mary Alexander — 1930 US Census Record
Model Tree available1930 United States Federal Census · Citrus, Florida
Our Model Tree links this Mary Alexander across the 1910, 1920 and 1930 US Censuses in Citrus, Florida (XGBoost, ~Confirmed), with identified parents Dennis & Dennis — first a daughter (b.~1909), then head of a 3-person household.
Age 21
b. ~1909
Female
Daughter
Born: Florida
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Citrus, Florida |
| Surname | Alexander |
| Given Name | Mary L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Florida |
| Father's Birthplace | Florida |
| Mother's Birthplace | Florida |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Florida |
| Birth Country | United States |
| Birthplace (normalized) | florida |
| Township / Ward | Inverness Town |
| Est. Birth Year | ~1909 |
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.
3 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Alexander | Daughter | — | 21 | ~1909 |
| Dennis Alexander | Head | — | 70 | ~1860 |
| Sam Alexander | Son | — | 19 | ~1911 |
Census Appearances
1910
Citrus, Florida
Daughter, age 2
Citrus, Florida · implied b. ~1908 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Alexander |
| Given Name | Mary Alice |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Florida |
| Father's Birthplace | Florida |
| Mother's Birthplace | Florida |
| Birth State | Florida |
| Birth Country | United States |
| Birthplace (normalized) | florida |
1920
Citrus, Florida
Daughter, age 11
Citrus, Florida · implied b. ~1909 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Alexander |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Florida |
| Father's Birthplace | Florida |
| Mother's Birthplace | Florida |
| Speaks English | Yes |
| Birth State | Florida |
| Birth Country | United States |
| Birthplace (normalized) | florida |
1930
Citrus, Florida
Daughter, age 21
Citrus, Florida · implied b. ~1909 — 3 household members
| Surname | Alexander |
| Given Name | Mary L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Florida |
| Father's Birthplace | Florida |
| Mother's Birthplace | Florida |
| Can Read/Write | Yes |
| Birth State | Florida |
| Birth Country | United States |
| Birthplace (normalized) | florida |
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 Alexander across 3 US Census years (1910, 1920 and 1930) in Citrus, Florida, using XGBoost record linkage. Identified parents: father Dennis Alexander (~0.92 confidence) and father Dennis Alexander (~0.92 confidence) and mother Addie Alexander (~0.92 confidence) and mother Addie Alexander (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Dennis Alexander
b. ~1860
Source father
● Household
· direct · ~0.92
Father
Dennis Alexander
b. ~1871
Source father
● Household
· direct · ~0.92
Mother
Addie Alexander
b. ~1875
Source mother
● Household
· direct · ~0.92
Mother
Addie Alexander
b. ~1875
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Alexander
Daughter · 1930 · age 21 · b. ~1909 · Florida
★ You are viewing this record
Sibling
Sam Alexander
Sibling · 1930 · age 19
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
1930 US Federal Census — Citrus, Florida
Open full size
1930 US Federal Census — Citrus, Florida
Page Contents
50 people indexed on this census page (ia:1930:15thcensus308unit:0329)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Will Henderson | 38 | Head | Laborer | Florida |
| 52 | Carrie L. Henderson | 34 | Wife-H | — | Florida |
| 53 | William M. Henderson | 20 | Son | Laborer | Florida |
| 54 | Lula Robinson | 30 | Head | Laundress | Georgia |
| 55 | Lula Robinson | 12 | Daughter | — | Georgia |
| 56 | Johnnie Robinson | 10 | Son | — | Georgia |
| 57 | L. C. Robinson | 8 | Son | — | Georgia |
| 58 | Marie Robinson | 6 | Daughter | — | Georgia |
| 59 | L. B. Robinson | 4 | Son | — | Georgia |
| 60 | Elias Alexander | 47 | Head | Helper | Georgia |
| 61 | Mae Alexander | 42 | Wife | Cook | Georgia |
| 62 | Washington Alexander | 18 | Son | — | Florida |
| 63 | Jack Alexander | 15 | Son | — | Florida |
| 64 | Fred Alexander | 13 | Son | Laborer | Florida |
| 65 | Willie Alexander | 11 | Son | — | Florida |
| 66 | Ila Alexander | 9 | Daughter | — | Florida |
| 67 | Lula Alexander | 7 | Daughter | — | South Carolina |
| 68 | Dennis Alexander | 70 | Head | Retired | Florida |
| 69 | Sam Alexander | 19 | Son | Mail Carrier | Florida |
| 70 | Mary L. Alexander THIS PERSON | 21 | Daughter | — | Florida |
| 71 | Winfield Blount | 12 | Head | — | Florida |
| 72 | Sarah Blount | 9 | Head | — | Florida |
| 73 | Charlie Murphy | 28 | Head | Laborer | South Carolina |
| 74 | Essie Murphy | 25 | Wife-H | — | Florida |
| 75 | Charlie Murphy | 2 | Son | — | Georgia |
| 76 | Louis Dixon | 20 | Lodger | Porter | Florida |
| 77 | Robert Davis | 22 | Lodger | Porter | Georgia |
| 78 | Ludger Davis | 19 | Lodger | Conductor | Georgia |
| 79 | Jim Smith | 38 | Head | Laborer | Florida |
| 80 | Annie Smith | 38 | Wife-H | — | Florida |
| 81 | Isiah Smith | 16 | Son | Helper | Florida |
| 82 | Lucille Smith | 8 | Daughter | — | Florida |
| 83 | Dorothy Smith | 3 | Daughter | — | Florida |
| 84 | Sam Smith | 39 | Head | — | North Carolina |
| 85 | Lucille Smith | 20 | Daughter | Cook | Georgia |
| 86 | Sam Smith | 19 | Son | Laborer | Florida |
| 87 | Emmett Smith | 13 | Son | — | Florida |
| 88 | Pauline Smith | 5 | Daughter | — | Florida |
| 89 | James Smith | 1 | Son | — | Florida |
| 90 | James Harrison | 36 | Head | Porter | South Carolina |
| 91 | Florence Harrison | 27 | Wife | — | South Carolina |
| 92 | Thelma H. Harrison | 6 | Step Daughter | — | Virginia |
| 93 | Thelma Jones | 15 | Sister-in-law | — | South Carolina |
| 94 | Sam Jones | 5 | Son | — | Florida |
| 95 | Missouri Jones | 64 | Lodger | Cook | Georgia |
| 96 | Russell Mendenhall | 25 | Head | Laundress | Georgia |
| 97 | Mary Mendenhall | 25 | Wife | — | Georgia |
| 98 | Russell Mendenhall | 2 | Son | — | Florida |
| 99 | Ugly Ugly | 20 | Head | Laborer | Florida |
| 100 | Willie Ugly | 14 | Brother | Dish Washer | Florida |
Pedigree Summary
Mary + 1 sibling
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 1930 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)