New England Families

I haven't found a birth record for Mary Elizabeth under any possible surname, nor by looking just for her mother's name.

There is a Mary Ellen Brown on the birth index, born in 1895, who is a twin to a Peter Brown. Both are in Volume 450, Page 189. Is this her?

1900 Census Ward 2, (East) Boston, ED 1180, sheet 2b
January 1, 1900
at 168 Marginal Street

William Brown, 28, February 1872, married 4 years, Born in Massachusetts, father in Maine, mother in Ireland, longshoreman, out of work 4 months in past year
Margaret Brown, 34, December 1865, married 4 years, 2 children, 1 alive, born in England, parents in Ireland, unknown when arrived
Annie L Brown, 4, June 1895, born in Massachusetts, father in Maine, mother in England

"United States Census, 1900," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/M9YS-2RG : accessed 4 March 2015), William Brown, Precinct 6 Boston city Ward 2, Suffolk, Massachusetts, United States; citing sheet 2B, family 42, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,240,676.

1910 Census, Ward 2 (East) Boston, ED 1269, sheet 19B, family 240
(Supplemental)
April 23, 1910
Renting at 64 Chelsea Street

Mary E Carrigan, 40, head, single, born in Massachusetts, parents in Ireland, labeling, fish factory
Elizabeth F Jenkins, 20, lodger, single, born in Massachusetts, father in Massachusetts, mother in England, stitcher, laundry
Mary E Brown, 15, lodger, single, born in Massachusetts, father in Massachusetts, mother in England, wash girl, department store
Catherine Fallon, 87, mother, widowed, no children, none alive, born in Ireland, parents also, arrived 1845, no occupation

"United States Census, 1910," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/M2KN-4QT : accessed 1 March 2015), Mary E Carrigan, Boston Ward 2, Suffolk, Massachusetts, United States; citing enumeration district (ED) 1269, sheet 19B, family 240, NARA microfilm publication T624 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,374,627.

1910 Census, Ward 2, (East) Boston, ED 1280, sheet 10a
April 23, 1910
at 170 Marginal Street

William H Brown, 39, widowed, married 16 years, born in Massachusetts, father also, mother in Ireland, laborer, docks, out of work 19 weeks last year
Mary E Brown, 15, born in Massachusetts, parents also
Margaret L Brown, 6, born in Massachusetts, parents also
Thomas J Glavin, 23, lodger, laborer, docks
George J Bronfield, 22, lodger, laborer, docks

"United States Census, 1910," index and images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/M2KN-F1S : accessed 4 March 2015), Mary E Brown in household of William H Brown, Boston Ward 2, Suffolk, Massachusetts, United States; citing enumeration district (ED) 1280, sheet 10A, family 174, NARA microfilm publication T624 (Washington, D.C.: National Archives and Records Administration, n.d.); FHL microfilm 1,374,627.

Mary Brown was living at 11 Cottage St when she married William Bradshaw.

Mary Ellen was living at 50 Lexington Street when she was married. This was the residence of John F Bromfield and family. In 1920, Mary Ellen's sister Margaret Lillian Brown was living at 94 Lexington with the Bromfields. John's wife, Annie (Brown) Bromfield, was their father's sister.
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Here is John F Bromfield in 1917:
1917 Boston City Directory (page 296, image at ancestry.com 292)
John F Bromfield, tallyman, house 50 Lexington EB

living at 115 Everett Street when their first son named William Albert was born. This was the home of Mary E Brown's aunt and uncle Catherine (Carrigan) and James Jenkins.

living at 48 Union Park when their second son named Warren Albert was born.

1920 Census, Ward 6, (South) Boston, ED 169, Sheet 15A
January 13, 1920
at 43 Upton Street

John H Feeley, 34, machinist
May Feeley, 21, keeper, lodging house
May E Burr, 22, married, lodger, born in Massachusetts, parents in Ireland, no occupation
Warren Burr, 4m, lodger, born in Massachusetts, father in Pennsylvania, mother in Massachusetts
... other lodgers
Charles C Grant, 27, single, born in Canada, parents also, arrived 1909, naturalized 1919, sheet metal worker, roofing
... other lodgers

Mary was living at 15 Templeton Street, Dorchester, when she and Charles applied for a marriage license.

1930 Census Ward 14 Boston, (Dorchester), Massachusetts
April 3, 1930
renting at 25 Ballou Avenue

Charles C Grant, 38, married 1st at 25, tile roofer, roofing
Mary E Grant, 36, married 1st at 23
Warren Grant, 11
Charles C Grant Jr, 8
Edna Grant, 5
Lorraine Grant, 4y 11m
Jean Grant, 2y 1m

all born in Massachusetts, parents also (even Charles Sr, who was born in Canada)

1940 Census, Ward 16, (Dorchester) Boston, ED 15-568, sheet 4A
April 16, 1940
at 1764 Dorchester Avenue

Charles Grant, 48, head, 6 years school, born in Canada, naturalized, roofer, house repair, private work
Mary E Grant, 46, 4 years high school, born in Massachusetts
Jean M Grant, 12,
John R Grant, 9
Robert Grant, 7
Warren A Burr, 20, stepson, 4 years high school, typist, school w. program, government work
Charles C Burr, 18, stepson, 13? years school, occupation type: other
Edna Burr, 15, stepdaughter, 2 years high school, in school
Lorraine Burr, 14, stepdaughter, 7 years school, in school

Charles Grant provided the information. All lived in the same place, Boston, in 1935. All children born in Massachusetts

1952 Boston City Directory
(page 943, image 1636)
Mary E Grant (Mrs Chas C) died March 16, 1951

(page 942, image 1635)
Charles C Grant, roofer, house 1764 Dorchester Ave Dorchester
Charles C Grant, Jr, USA r 1764 Dorchester Ave Dorchester
Robert Grant, USN, r 1764 Dorchester Ave Dorchester
Jean Grant, exam. Filene's, r 1764 Dorchester Ave Dorchester
John Grant, USMC, r 1764 Dorchester Ave Dorchester

(page 443, image 1136)
Warren Burr, clerk, r 1764 Dorchester Ave Dorchester

1952 Boston City Directory
(page 943, image 1636)
Mary E Grant (Mrs Chas C) died March 16, 1951

Boston Globe March 19, 1951, Page 19.
Grant-Burr - In Dorchester, March 16, Mary E, residence 1764 Dorchester Avenue, beloved wife of Charles C Grant, sister of Mrs Margaret McEchern, mother of Warren and Charles Burr, Mrs Edna Stewart and Lorraine Burr, Jean, Richard and Robert Grant. Funeral from the John C Mulry Funeral Home, King St at Dorchester Avenue, Tuesday at 8 am. Solemn High Mass of Requiem in St Mark's Church at 9 o'clock. Relatives and friends invited. Member of St Mark's Auxiliary and Sodality. Visiting hours 2-5 and 7-10 pm.