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1930 U.S. Census, Baltimore City, Maryland
7th Ward, Block 66, Enumeration District 4-81, Sheet 5A
814 North Linwood Avenue
Dwelling 63, Family 68
Davis, Roland M., head, owner, real estate valued at $4,000, owns radio set, male, white, 27, married, age at first marriage 19, not in school, can read and write, born in Virginia, both parents born in Virginia, speaks English, crane operator, excavating, wage worker, at work previous day, not a veteran
Davis, Anna, wife, female, white, 26, married, age at first marriage 26, not in school, can read and write, born in Maryland, both parents born in Maryland, speaks English, no occupation
Davis, Roland J., son, male, white, 8, single, in school, can read and write, born in Maryland, father born in Virginia, mother born in Maryland, speaks English, no occupation
Davis, Loretta M., daughter, female, white, 6, single, in school, can read and write, born in Maryland, father born in Virginia, mother born in Maryland, speaks English, no occupation

1940 U.S. Census, Baltimore City, Maryland
7th Ward, Enumeration District 4-113, Sheet 61B
814 North Linwood Avenue
Family 215, owned, value $3,000, not on farm
Davis, Roland, head, male, white, 38, married, not in school, highest level of education 7th grade, born in Virginia, living in same house in 1935, at work week of March 24–30, worked 60 hours that week, crane operator for railroad, wage worker, employed 52 weeks in 1939, income in 1939 $2,400, no other sources of income
Davis, Anna, wife, female, white, 37, married, not in school, highest level of education 7th grade, born in Maryland, living in same house in 1935, not at work, not seeking work, engaged in housework, no other sources of income
Davis, Roland Jr., son, male, white, 18, single, not in school, highest level of education 4 years of high school, born in Maryland, living in same house in 1935, at work week of March 24–30, worked 32 hours that week, collector service for newspaper, wage worker, worked 5 weeks in 1939, income in 1939 $75, no other sources of income
Davis, Loretta, daughter, female, white, 16, single, in school, highest level of education 3 years of high school, born in Maryland, living in same house in 1935, not at work, in school, no other sources of income

She married Mark McDonnell at her parents’ home, 1508 Kenhill Avenue, Baltimore, Maryland.

1958 Baltimore City Directory, page 796:
McDONNELL, Mark F (Loretta) clk Balto G&E r1512 N Ellwood av

A death notice stated:
McDonnell, Loretta
Loretta Davis McDonnell, 92, of Boonsboro, MD, passed away, Tuesday, February 2, 2016, at her home.
Born Saturday, September 1, 1923 in Baltimore, MD, she was the daughter of the late Roland Madison Davis and the late Anna (Bangert) Davis.
She graduated from Patterson Park High School in Baltimore and attended Towson State College. She was Vice President of Citigroup for 28 years, retiring in 1992. After retirement she was employed with First Data Corp for 5 years. She was a very active member of St. James Catholic Church, Boonsboro and with the Adoration Chapel at St. Ann Catholic Church. Loretta cherished the time she spent with her grandchildren.
She is survived by her daughter, Jacelyn McDonnell of Boonsboro, MD; son, Dr. Mark McDonnell III and wife, Dr. Marie Cepero of Lafayette, LA; two granddaughters, Elisabeth McDonnell of Brooklyn, NY and Margaret (Mollie) McDonnell of Seattle, WA; grandson, Mark F. McDonnell, IV of Lafayette, LA; and 2 faithful canine companions, Abbie and Lucy.
She was preceded in death by her husband, Mark Francis McDonnell and brother, Roland J. Davis.
A Mass of Christian Burial will be held Saturday, February 6, 2016, at 10:00 am, at the St. James Catholic Church, 121 North Main Street Boonsboro, MD, with the Rev. John Jicha officiating.
There will be no viewing or visitation.
Interment will be held privately at the Parkwood Cemetery, Baltimore, MD.
In lieu of flowers, memorial donations may be made to St. James Catholic Church, 121 North Main Street, Boonsboro, MD 21713, the Humane Society of Washington County, 13011 Maugansville Rd., Hagerstown, MD 21740 or to Hospice of Washington County, 747 Northern Ave., Hagerstown, MD 21742.
Online condolences may be expressed at www.douglasfiery.com