WM
William Mcgrath — 1930 US Census Record
Model Tree available1930 United States Federal Census · Essex, Massachusetts
Our Model Tree links this William Mcgrath across the 1910, 1920 and 1930 US Censuses in Essex, Massachusetts (XGBoost, ~Confirmed), with identified parents John & John — first a son (b.~1902), then head of a 4-person household.
Age 28
b. ~1902
Male
Son
Born: Massachusetts
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Essex, Massachusetts |
| Surname | McGrath |
| Given Name | William F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Additional Details | |
| Occupation | Truck driver |
| Industry | Coal yard |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Truck Driver |
| Township / Ward | Salem City |
| Est. Birth Year | ~1902 |
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.
4 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| William Mcgrath | Son | — | 28 | ~1902 |
| John Leonard | Other | — | 28 | ~1902 |
| Mary Mcgrath | Head | — | 51 | ~1879 |
| Marguerite Leonard | Daughter | — | 27 | ~1903 |
Census Appearances
1910
Essex, Massachusetts
Son, age 8
Essex, Massachusetts · implied b. ~1902 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McGrath |
| Given Name | William |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1920
Essex, Massachusetts
Son, age 18
Essex, Massachusetts · implied b. ~1902 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McGrath |
| Given Name | William |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | teamster |
| Industry | coal yard |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Essex, Massachusetts
Son, age 28
Essex, Massachusetts · implied b. ~1902 — 4 household members
| Surname | McGrath |
| Given Name | William F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | Truck driver |
| Industry | Coal yard |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
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 Mcgrath across 3 US Census years (1910, 1920 and 1930) in Essex, Massachusetts, using XGBoost record linkage. Identified parents: father John Mcgrath (~0.92 confidence) and father John Mcgrath (~0.92 confidence) and mother Mary Mcgrath (~0.92 confidence) and mother Mary Mcgrath (~0.92 confidence) and mother Mary Mcgrath (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Mcgrath
b. ~1875
Source father
● Household
· direct · ~0.92
Father
John Mcgrath
b. ~1874
Source father
● Household
· direct · ~0.92
Mother
Mary Mcgrath
b. ~1879
Source mother
● Household
· direct · ~0.92
Mother
Mary Mcgrath
b. ~1876
Source mother
● Household
· direct · ~0.92
Mother
Mary Mcgrath
b. ~1874
Source mother
● Household
· direct · ~0.92
This person
Anchor record
William Mcgrath
Son · 1930 · age 28 · b. ~1902 · Massachusetts
★ You are viewing this record
Sibling
Marguerite Leonard
Sibling · 1930 · age 27
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 — Essex, Massachusetts
Open full size
1930 US Federal Census — Essex, Massachusetts
Page Contents
50 people indexed on this census page (ia:1930:massachusettscensus00reel902:0941)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | George A. Hart | 46 | Head | Buyer | Irish Free State |
| 2 | Mary B. Hart | 47 | Wife | — | Massachusetts |
| 3 | J. Russell Hart | 17 | Son | — | Massachusetts |
| 4 | Beatrice E. O'Neil | 60 | Head | — | Pennsylvania |
| 5 | Marion E. O'Neil | 32 | Daughter | Complimenter | Massachusetts |
| 6 | Thomas H. O'Neil | 63 | Brother-in-law | Shipper | Massachusetts |
| 7 | Adam Bick | 50 | Head | Carder | Poland |
| 8 | Ida Bick | 43 | Wife | Carder | Poland |
| 9 | Stella Bick | 21 | Daughter | Office Clerk | Poland |
| 10 | Helen Bick | 19 | Daughter | Office Clerk | Massachusetts |
| 11 | Arthur L. Ricard | 36 | Head | Tanner | Massachusetts |
| 12 | Mary L. Ricard | 36 | Wife | Weaver | Massachusetts |
| 13 | Mildred Ricard | 10 | Daughter | — | Massachusetts |
| 14 | Mary E. Mcgrath | 51 | Head | — | Massachusetts |
| 15 | William F. Mcgrath THIS PERSON | 28 | Son | Truck Driver | Massachusetts |
| 16 | Marguerite Leonard | 27 | Daughter | Order Clerk | Massachusetts |
| 17 | John Leonard | 28 | Son-in-law | Weaver | Massachusetts |
| 18 | William H. Condon | 37 | Head | Installer | Massachusetts |
| 19 | Alice H. Condon | 30 | Wife | — | Massachusetts |
| 20 | William H. Jr. Condon | 2 | Son | — | Massachusetts |
| 21 | June M. Condon | 0 | Daughter | — | Massachusetts |
| 22 | Mary B. Condon | 57 | Mother | — | Irish Free State |
| 23 | Samuel E. Oakley | 70 | Head | — | England |
| 24 | Walter E. Oakley | 46 | Head | Packer | Maine |
| 25 | Frank G. Smith | 59 | Head | Janitor | Massachusetts |
| 26 | Mary E. Smith | 52 | Wife | — | Massachusetts |
| 27 | Rebecca Parsons | 50 | Head | Housework | Canada English |
| 28 | Muriel Parsons | 22 | Daughter | — | Massachusetts |
| 29 | Eleanor Parsons | 17 | Daughter | — | Massachusetts |
| 30 | Frances Parsons | 13 | Daughter | — | Massachusetts |
| 31 | Everett Parsons | 21 | Son | Busboy | Massachusetts |
| 32 | Howard Parsons | 15 | Son | Packer | Massachusetts |
| 33 | Edward W. Osgood | 40 | Head | Motorman | Massachusetts |
| 34 | Catherine G. Osgood | 33 | Wife | — | Massachusetts |
| 35 | Edward W. Jr. Osgood | 6 | Son | — | Massachusetts |
| 36 | Augustus Wallace | 52 | Head | — | Massachusetts |
| 37 | Annie L. Proctor | 65 | Marginal | Nurse | Canada English |
| 38 | John Olson | 43 | Head | Train Agent | Massachusetts |
| 39 | Sarah E. Olson | 39 | Wife | — | Massachusetts |
| 40 | Max Olson | 11 | Daughter | — | Massachusetts |
| 41 | Madeline Olson | 8 | Daughter | — | Massachusetts |
| 42 | Ruth Olson | 5 | Daughter | — | Massachusetts |
| 43 | Dorothea Olson | 2 | Daughter | — | Massachusetts |
| 44 | Margaret Bentley | 45 | Head | Counter Worker | Massachusetts |
| 45 | Caleb Bentley | 50 | Brother | Laborer | Massachusetts |
| 46 | Anthony Spychalski | 37 | Head | Machinist | Poland |
| 47 | Jennie Spychalski | 30 | Wife | Stitcher | Massachusetts |
| 48 | Leonard Spychalski | 1 | Son | — | Massachusetts |
| 49 | Daniel J. Mahoney | 54 | Head | Stationary Engineer | Irish Free State |
| 50 | Elizabeth Mahoney | 54 | Wife | — | Irish Free State |
Pedigree Summary
William + 1 sibling
Gen 1 · 5 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)