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William Harmon — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Baltimore, Maryland
Our Model Tree links this William Harmon across the 1930 and 1940 US Censuses in Baltimore, Maryland (XGBoost, ~Confirmed) — first a son (b.~1912), then head of a 9-person household.
Age 18
b. ~1912
Male
Son
Born: Maryland
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Baltimore, Maryland |
| Surname | Harmon |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | North Carolina |
| Mother's Birthplace | Maryland |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Baltimore City |
| Est. Birth Year | ~1912 |
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 1930 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| George Mitchell | Other | — | 25 | ~1905 |
| James Harmon | Son | — | 15 | ~1915 |
| William Harmon | Son | — | 18 | ~1912 |
| Thomas Harmon | Head | — | 52 | ~1878 |
| Annie Harmon | Daughter | — | 5 | ~1925 |
| John Harmon | Son | — | 12 | ~1918 |
| Lillian Harmon | Other | — | 38 | ~1892 |
| Lillian Harmon | Daughter | — | 8 | ~1922 |
| Thomas Harmon | Son | — | 17 | ~1913 |
Census Appearances
1930
Baltimore, Maryland
Son, age 18
Baltimore, Maryland · implied b. ~1912 — 9 household members
| Surname | Harmon |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | North Carolina |
| Mother's Birthplace | Maryland |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-City-County, Maryland
Son, age 29
Baltimore-City-County, Maryland · implied b. ~1911 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harman |
| Given Name | Wilfred |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore city |
| 1935 Residence (County) | Baltimore |
| Class of Worker | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
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 William Harmon across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Harmon
Son · 1930 · age 18 · b. ~1912 · Maryland
★ You are viewing this record
Sibling
Lillian Harmon
Sibling · 1930 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Harmon
Sibling · 1930 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Annie Harmon
Sibling · 1930 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Harmon
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Harmon
Sibling · 1930 · age 12
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 — Baltimore, Maryland
Open full size
1930 US Federal Census — Baltimore, Maryland
Page Contents
50 people indexed on this census page (ia:1930:15thcensus850unit:0296)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | William French | 39 | Head | Laborer | Maryland |
| 52 | Maggie French | 37 | Wife-H | — | District of Columbia |
| 53 | James Brown | 21 | Boarder | Laborer | District of Columbia |
| 54 | Samuel Dixon | 49 | Head | Laborer | North Carolina |
| 55 | Annie Dixon | 46 | Wife-H | — | Maryland |
| 56 | Franklin Dixon | 19 | Son | Laborer | Maryland |
| 57 | Annie Dixon | 26 | Daughter | Laborer | Maryland |
| 58 | Rose Brown | 50 | Head | Laundress | Maryland |
| 59 | Jess Rossy | 31 | Boarder | Laborer | Virginia |
| 60 | Dave Pal | 35 | Head | Laborer | Virginia |
| 61 | Emma Pal | 30 | Wife-H | — | Virginia |
| 62 | Vernon Buen | 28 | Head | Laborer | Maryland |
| 63 | Kenney Buen | 45 | Mother-H | — | Maryland |
| 64 | Bessie Buen | 30 | Sister | — | Maryland |
| 65 | Gertie Buen | 40 | Sister | Laundress | Maryland |
| 66 | George Smith | 24 | Head | Porter | Maryland |
| 67 | Willie Smith | 20 | Wife-H | — | Maryland |
| 68 | Beverly Smith | 1 | Daughter | — | Maryland |
| 69 | Aaron Fayson | 23 | Boarder | Laborer | Maryland |
| 70 | Jerome Baker | 24 | Boarder | Waiter | Maryland |
| 71 | James M. Jones | 54 | Head | Laborer | Maryland |
| 72 | Susie Jones | 54 | Wife-H | — | Maryland |
| 73 | Kenny William | 47 | Head | Laborer | North Carolina |
| 74 | Rockie William | 39 | Wife-H | — | North Carolina |
| 75 | Lewis Steward | 60 | Boarder | Laborer | Maryland |
| 76 | Eunice Ireland | 15 | Boarder | — | Maryland |
| 77 | James Roane | 49 | Head | Laborer | North Carolina |
| 78 | Bessie Roane | 11 | Daughter | — | North Carolina |
| 79 | George W. Quincy | 59 | Head | Laborer | North Carolina |
| 80 | Lottie Quincy | 47 | Wife-H | — | North Carolina |
| 81 | George Jr. Quincy | 25 | Head | Laborer | Maryland |
| 82 | Mildred Quincy | 24 | Wife-H | — | Maryland |
| 83 | Fernanda Quincy | 6 | Son | — | Maryland |
| 84 | William Rivers | 27 | Head | Laborer | North Carolina |
| 85 | Mary Rivers | 19 | Wife-H | — | North Carolina |
| 86 | Mildred Rivers | 1 | Daughter | — | Maryland |
| 87 | Thomas Harmon | 52 | Head | Laborer | North Carolina |
| 88 | Lillian Harmon | 38 | Wife-H | — | Maryland |
| 89 | William Harmon THIS PERSON | 18 | Son | — | Maryland |
| 90 | Thomas Harmon | 17 | Son | Laborer | Maryland |
| 91 | James Harmon | 15 | Son | Laborer | Maryland |
| 92 | John Harmon | 12 | Son | — | Maryland |
| 93 | Lillian Harmon | 8 | Daughter | — | Maryland |
| 94 | Annie Harmon | 5 | Daughter | — | Maryland |
| 95 | George Mitchell | 25 | Boarder | Laborer | Maryland |
| 96 | Andrew Watson | 28 | Head | Laborer | North Carolina |
| 97 | Katie Watson | 24 | Wife-H | — | Maryland |
| 98 | Alex Smith | 39 | Head | Laborer | North Carolina |
| 99 | Florence Smith | 38 | Wife-H | — | North Carolina |
| 100 | William Smith | 16 | Son | Laborer | North Carolina |
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)