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Mary Mcmahon — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Henrico, Virginia
Our Model Tree links this Mary Mcmahon across the 1920 and 1930 US Censuses in Henrico, Virginia (XGBoost, ~Confirmed) — first a daughter (b.~1917), then head of a 11-person household.
Age 13
b. ~1917
Female
Daughter
Born: Virginia
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Henrico, Virginia |
| Surname | McMahon |
| Given Name | Mary P. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Virginia |
| Father's Birthplace | Virginia |
| Mother's Birthplace | Virginia |
| Additional Details | |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
| Township / Ward | Richmond City |
| 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.
11 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Annie Mcmahon | Daughter | — | 17 | ~1913 |
| Margaret Jones | Daughter | — | 25 | ~1905 |
| Lenora Mcmahon | Daughter | — | 21 | ~1909 |
| Mary Mcmahon | Daughter | — | 13 | ~1917 |
| Helen Mcmahon | Daughter | — | 24 | ~1906 |
| Rosa Mcmahon | Daughter | — | 26 | ~1904 |
| Maurice Mcmahon | Daughter | — | 28 | ~1902 |
| Daniel Mcmahon | Head | — | 54 | ~1876 |
| Lee Jones | Other | — | 26 | ~1904 |
| Bernard Mcmahon | Son | — | 17 | ~1913 |
| Mary Mcmahon | Spouse | — | 52 | ~1878 |
Census Appearances
1920
Henrico, Virginia
Daughter, age 2
Henrico, Virginia · implied b. ~1918 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McMahon |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Virginia |
| Father's Birthplace | Virginia |
| Mother's Birthplace | Virginia |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
1930
Henrico, Virginia
Daughter, age 13
Henrico, Virginia · implied b. ~1917 — 11 household members
| Surname | McMahon |
| Given Name | Mary P. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Virginia |
| Father's Birthplace | Virginia |
| Mother's Birthplace | Virginia |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
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 Mcmahon across 2 US Census years (1920 and 1930) in Henrico, Virginia, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Mcmahon
Daughter · 1930 · age 13 · b. ~1917 · Virginia
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Sibling
Bernard Mcmahon
Sibling · 1930 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rosa Mcmahon
Sibling · 1930 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Annie Mcmahon
Sibling · 1930 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Maurice Mcmahon
Sibling · 1930 · age 28
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Mcmahon
Sibling · 1930 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Jones
Sibling · 1930 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lenora Mcmahon
Sibling · 1930 · age 21
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 — Henrico, Virginia
Open full size
1930 US Federal Census — Henrico, Virginia
Page Contents
50 people indexed on this census page (ia:1930:15thcensus2477unit:0123)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Alvin D. Davis | 69 | Head | Clothing Salesman | Virginia |
| 2 | Ella N. Davis | 69 | Wife | None | Virginia |
| 3 | Ethel M. Davis | 37 | Daughter | Bank Clerk | Virginia |
| 4 | Walter J. Davis | 36 | Son | None | Virginia |
| 5 | Mollie Lansdown | 67 | Sister-in-law | Telephone Operator | Virginia |
| 6 | Lucile B. Lansdown | 43 | Niece | None | Virginia |
| 7 | Robert W. Wallis | 44 | Lodger | Barber | Maryland |
| 8 | E. Marion Paul | 56 | Head | None | Virginia |
| 9 | Marion J. Paul | 21 | Daughter | Bank Clerk | Virginia |
| 10 | Majorie L. Paul | 18 | Daughter | None | Virginia |
| 11 | Lin C. Madison | 50 | Head | Carpenter Contractor | Virginia |
| 12 | Zelma J. Madison | 35 | Wife | Machine Operator | Virginia |
| 13 | Nellie Neville | 55 | Head | Seamstress | England |
| 14 | Ruby Purdue | 40 | Boarder | None | Virginia |
| 15 | Walter J. Scales | 61 | Head | Minister | Virginia |
| 16 | Mary R. Scales | 61 | Wife | None | Virginia |
| 17 | Edward L. Wood | 51 | Head | Commission Merchant | Virginia |
| 18 | Rebecca D. Wood | 44 | Wife | None | Virginia |
| 19 | Andrew Wood | 21 | Son | Real Estate Salesman | Virginia |
| 20 | M. Catherine Wood | 20 | Daughter | None | Virginia |
| 21 | Charles S. Wood | 15 | Son | None | Virginia |
| 22 | Elizabeth Dunkel | 70 | Head | None | Ohio |
| 23 | Lilla Dunkel | 48 | Daughter | None | Virginia |
| 24 | Hazel W. Dunkel | 41 | Daughter | None | Virginia |
| 25 | Daniel A. Mcmahon | 54 | Head | None | Virginia |
| 26 | Mary E. Mcmahon | 52 | Wife | None | Virginia |
| 27 | Maurice M. Mcmahon | 28 | Daughter | Private Secretary | Virginia |
| 28 | Rosa L. Mcmahon | 26 | Daughter | Envelope Packer | Virginia |
| 29 | Helen L. Mcmahon | 24 | Daughter | Wrapper | Virginia |
| 30 | Lenora E. Mcmahon | 21 | Daughter | Stenographer | Virginia |
| 31 | Annie Mcmahon | 17 | Daughter | Envelope Inspector | Virginia |
| 32 | Bernard J. Mcmahon | 17 | Son | Lithographer | Virginia |
| 33 | Mary P. Mcmahon THIS PERSON | 13 | Daughter | None | Virginia |
| 34 | Lee J. Jones | 26 | Son-in-law | Auto Mechanic | Virginia |
| 35 | Margaret E. Jones | 25 | Daughter | None | Virginia |
| 36 | William Gray | 56 | Head | Produce Merchant | Virginia |
| 37 | Irena F. Gray | 54 | Wife | None | Virginia |
| 38 | William H. Gray | 18 | Son | None | Virginia |
| 39 | Daniel J. Mcauley | 44 | Head | Salesman | Virginia |
| 40 | Elizabeth Mcauley | 44 | Wife | Clerk | Virginia |
| 41 | Augusta Mcauley | 17 | Daughter | None | Virginia |
| 42 | Geo. E. Sulling | 20 | Boarder | Bank Clerk | Virginia |
| 43 | Ella F. Sulling | 20 | Boarder | Stenographer | Virginia |
| 44 | Joseph M. Johnson | 36 | Lodger | Salesman | Virginia |
| 45 | A. Garrett Floyd | 46 | Head | Grocery Merchant | Virginia |
| 46 | Jessie P. Floyd | 45 | Wife | None | Virginia |
| 47 | Marion H. Floyd | 24 | Daughter | Stenographer | Virginia |
| 48 | Irena B. Floyd | 23 | Daughter | Stenographer | Virginia |
| 49 | Jessie P. Floyd | 20 | Daughter | School Teacher | Virginia |
| 50 | Jean G. Floyd | 19 | Daughter | School Teacher | Virginia |
Related Census Records
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)