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William Kirby — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Baltimore-City-County, Maryland
Our Model Tree links this William Kirby across the 1930 and 1940 US Censuses in Baltimore-City-County, Maryland (XGBoost, ~Confirmed) — first a son (b.~1930), then head of a 8-person household.
Age 10
b. ~1930
Male
Son
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-City-County, Maryland |
| Surname | Kirby |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | 4 |
| 1935 Residence | Same Place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | Baltimore City |
| Est. Birth Year | ~1930 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| Katherine Witzgall | Other | — | 65 | ~1875 |
| George Kirby | Son | — | 18 | ~1922 |
| Evelyn Kirby | Spouse | — | 38 | ~1902 |
| Charles Kirby | Son | — | 13 | ~1927 |
| Mary Kirby | Daughter | — | 8 | ~1932 |
| Albert Kirby | Son | — | 16 | ~1924 |
| George Kirby | Head | — | 46 | ~1894 |
| William Kirby | Son | — | 10 | ~1930 |
Census Appearances
1930
Baltimore, Maryland
Son, age
Baltimore, Maryland · implied b. ~1930 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kirby |
| Given Name | William E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read/Write | No |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-City-County, Maryland
Son, age 10
Baltimore-City-County, Maryland · implied b. ~1930 — 8 household members
| Surname | Kirby |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Income (1939) | 0 |
| Highest Grade | 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 Kirby across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Kirby
Son · 1940 · age 10 · b. ~1930 · Maryland
★ You are viewing this record
Sibling
Mary Kirby
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Albert Kirby
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Kirby
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Kirby
Sibling · 1940 · age 18
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
1940 US Federal Census — Baltimore-City-County, Maryland
Open full size
1940 US Federal Census — Baltimore-City-County, Maryland
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01535-00392)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Armand Beard | 22 | Son | Board Boy | Maryland |
| 42 | Robert Beard | 14 | Son | — | Maryland |
| 43 | George Suit | 45 | Head | Watchman | Maryland |
| 44 | Mary Suit | 36 | Wife | — | Maryland |
| 45 | Catherine Suit | 14 | Daughter | — | Maryland |
| 46 | George F. Suit | 29 | Head | Labor | Maryland |
| 47 | Margaret Suit | 28 | Wife | — | Maryland |
| 48 | Mary A. Suit | 1 | Daughter | — | Maryland |
| 49 | Abe Margolis | 42 | Head | Taylor | Poland |
| 50 | Minnie Margolis | 39 | Wife | — | Russia |
| 51 | Phyllis B. Margolis | 9 | Daughter | — | Maryland |
| 53 | George Kirby | 46 | Head | Truck Driver | Maryland |
| 54 | Evelyn Kirby | 38 | Wife | — | Maryland |
| 55 | George Kirby | 18 | Son | Labor | Maryland |
| 56 | Albert Kirby | 16 | Son | Labor | Maryland |
| 57 | Charles Kirby | 13 | Son | — | Maryland |
| 58 | William Kirby THIS PERSON | 10 | Son | — | Maryland |
| 59 | Mary C. Kirby | 8 | Daughter | — | Maryland |
| 60 | Katherine Witzgall | 65 | Mother in law | — | Maryland |
| 61 | Andrew Soler | 39 | Head | Truck Driver | Maryland |
| 62 | Josephine Soler | 38 | Wife | — | Germany |
| 63 | Josephine Soler | 13 | Daughter | — | Maryland |
| 64 | Helen Soler | 10 | Daughter | — | Maryland |
| 65 | Marlin Soler | 5 | Daughter | — | Maryland |
| 66 | Carolyn Soler | 3 | Daughter | — | Maryland |
| 67 | John Soler | 38 | Head | Truck Driver | Maryland |
| 68 | Bessie Soler | 39 | Wife | — | Maryland |
| 69 | Andrew Soler | 18 | Son | Apprentice Butcher | Maryland |
| 70 | David Soler | 16 | Son | Delivery Boy | Maryland |
| 71 | Catherine Soler | 13 | Daughter | — | Maryland |
| 72 | Helen Soler | 11 | Daughter | — | Maryland |
| 73 | Edward Fisher | 30 | Head | Varnish Cleaner | Maryland |
| 74 | Rose Fisher | 25 | Wife | — | Maryland |
| 75 | Leroy Carson | 8 | Son | — | Maryland |
| 76 | Betty Fisher | 6 | Daughter | — | Maryland |
| 77 | Edward Jr. Fisher | 6 | Son | — | Maryland |
| 78 | Earl Fisher | 1 | Son | — | Maryland |
| 79 | Theodore Hull | 43 | Head | Iron Worker | Maryland |
| 80 | Catherine Hull | 35 | Wife | — | Virginia |
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)