JG
John Grace — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Middlesex, Massachusetts
Our Model Tree links this John Grace across the 1920 and 1930 US Censuses in Middlesex, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1912), then head of a 7-person household.
Age 18
b. ~1912
Male
Son
Born: Vermont
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Middlesex, Massachusetts |
| Surname | Grace |
| Given Name | John D. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Vermont |
| Father's Birthplace | Vermont |
| Mother's Birthplace | Maine |
| Additional Details | |
| Occupation | Clerk |
| Industry | Retail Grocery |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Vermont |
| Birth Country | United States |
| Birthplace (normalized) | vermont |
| Occupation | Clerk |
| Township / Ward | Wakefield Town Part |
| 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.
7 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Phyllis Grace | Daughter | — | 10 | ~1920 |
| George Grace | Son | — | 15 | ~1915 |
| Alice Grace | Daughter | — | 1 | ~1929 |
| Doris Grace | Daughter | — | 4 | ~1926 |
| Lawrence Grace | Son | — | 20 | ~1910 |
| Annie Grace | Head | — | 47 | ~1883 |
| John Grace | Son | — | 18 | ~1912 |
Census Appearances
1920
Essex, Massachusetts
Son, age 7
Essex, Massachusetts · implied b. ~1913 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Grace |
| Given Name | John D. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Vermont |
| Father's Birthplace | Vermont |
| Mother's Birthplace | Maine |
| Birth State | Vermont |
| Birth Country | United States |
| Birthplace (normalized) | vermont |
1930
Middlesex, Massachusetts
Son, age 18
Middlesex, Massachusetts · implied b. ~1912 — 7 household members
| Surname | Grace |
| Given Name | John D. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Vermont |
| Father's Birthplace | Vermont |
| Mother's Birthplace | Maine |
| Occupation | Clerk |
| Industry | Retail Grocery |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Vermont |
| Birth Country | United States |
| Birthplace (normalized) | vermont |
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 John Grace across 2 US Census years (1920 and 1930) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Grace
Son · 1930 · age 18 · b. ~1912 · Massachusetts
★ You are viewing this record
Sibling
Doris Grace
Sibling · 1930 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lawrence Grace
Sibling · 1930 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Grace
Sibling · 1930 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Phyllis Grace
Sibling · 1930 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Grace
Sibling · 1930 · age 15
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 — Middlesex, Massachusetts
Open full size
1930 US Federal Census — Middlesex, Massachusetts
Page Contents
50 people indexed on this census page (ia:1930:massachusettscensus00reel929:1053)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Julio Encarnacao | 39 | Head | Janitor | Portugal |
| 2 | Olivia Encarnacao | 39 | Wife-H | — | Rhode Island |
| 3 | Annie E. Grace | 47 | Head | — | Maine |
| 4 | Lawrence Grace | 20 | Son | General Worker | Vermont |
| 5 | John D. Grace THIS PERSON | 18 | Son | Clerk | Vermont |
| 6 | George V. Grace | 15 | Son | — | Vermont |
| 7 | Phyllis Grace | 10 | Daughter | — | Massachusetts |
| 8 | Doris T. Grace | 4 | Daughter | — | Massachusetts |
| 9 | Alice M. Grace | 1 | Daughter | — | Massachusetts |
| 10 | Joseph P. Gallagher | 40 | Head | Leather Worker | Northern Ireland |
| 11 | Julia Gallagher | 38 | Wife-H | — | Irish Free State |
| 12 | Antonio Orsini | 18 | Head | Sole Tapper | Massachusetts |
| 13 | Nicholas Orsini | 17 | Brother | — | Massachusetts |
| 14 | Antonette Orsini | 16 | Sister | — | Massachusetts |
| 15 | Grace Orsini | 14 | Sister | — | Massachusetts |
| 16 | Josephine Orsini | 13 | Sister | — | Massachusetts |
| 17 | Angelina Orsini | 11 | Sister | — | Massachusetts |
| 18 | Frank Orsini | 9 | Son | — | Massachusetts |
| 19 | Frank Orsini | 36 | Head | Rubber Cutter | Italy |
| 20 | Celia Orsini | 32 | Wife-H | — | Italy |
| 21 | Elizabeth Orsini | 12 | Daughter | — | Massachusetts |
| 22 | Antonette Orsini | 7 | Daughter | — | Massachusetts |
| 23 | Yolanda Orsini | 4 | Daughter | — | Massachusetts |
| 24 | Jean Orsini | 3 | Daughter | — | Massachusetts |
| 25 | Antonette Orsini | 80 | Mother | — | Italy |
| 26 | Camello Luciani | 43 | Head | Plasterer | Italy |
| 27 | Rose Luciani | 33 | Wife-H | — | Italy |
| 28 | Nicholas Luciani | 14 | Son | — | Massachusetts |
| 29 | Alfred Luciani | 11 | Son | — | Massachusetts |
| 30 | Jennie Luciani | 9 | Daughter | — | Massachusetts |
| 31 | Alice Luciani | 6 | Daughter | — | Massachusetts |
| 32 | Frank Luciani | 3 | Son | — | Massachusetts |
| 33 | John Luciani | 1 | Son | — | Massachusetts |
| 34 | Jack Orsini | 28 | Head | Contractor | Massachusetts |
| 35 | Mary Orsini | 24 | Wife-H | — | Massachusetts |
| 36 | Jack Jr. Orsini | 2 | Son | — | Massachusetts |
| 37 | David Smith | 49 | Head | Shoemaker | Germany |
| 38 | Sarah Smith | 44 | Wife-H | — | England |
| 39 | Victor Smith | 21 | Son | Repairman | Massachusetts |
| 40 | Wendell Smith | 25 | Son | Printer | Massachusetts |
| 41 | Leo Smith | 23 | Son | Pressman | Massachusetts |
| 42 | Rose Smith | 25 | Daughter in law | — | New York |
| 43 | George Vincena | 68 | Head | — | New York |
| 44 | Verdie Sampson | 54 | Housekeeper | Housekeeper | New York |
| 45 | Harrison Clark | 88 | Boarder | — | New Hampshire |
| 46 | Mary Pica | 49 | Head | Laborer | Italy |
| 47 | Mary Pica | 44 | Wife-H | — | Italy |
| 48 | James Pica | 23 | Son | Carpenter | Italy |
| 49 | Emillio Pica | 21 | Son | Rubber Worker | Italy |
| 50 | Fannie Pica | 17 | Daughter | Stitcher | Italy |
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)