At the time of Alverta’s birth, he lived at Bouldin and Hudson Streets in Baltimore.

When his son James was born, he lived at 732 South Potomac Street, Baltimore, Maryland.

The 1921 Baltimore City Directory lists on page 2206:
Young, Jas L plasterer 830 s Clinton

1930 U.S. Census, Baltimore City, Maryland
1st Ward, Block 113, Enumeration District 4-2, Sheet 4B
732 South Potomac Street
Dwelling 63, Family 67
Young, J. L., head, owns home valued at $4,450, owns radio set, male, white, married, age at first marriage 30, not in school, can read and write, born in Pennsylvania, both parents born in Pennsylvania, speaks English, plasterer, contractor, at work previous day, veteran of the World War
Young, Mary, wife, female, white, 38, married age at first marriage 30, not in school, can read and write, born in Maryland, both parents born in Maryland, speaks English, no occupation
Young, Alberta [sic], daughter, female, white, 7, single, in school, can read and write, born in Maryland, father born in Pennsylvania, mother born in Maryland, speaks English, no occupation
Young, James, son, male, white, 5, single, in school, can read and write, born in Maryland, father born in Pennsylvania, mother born in Maryland, speaks English, no occupation
Tuerke, Clara, step daughter, female, white, 18, single, not in school, can read and write, born in Maryland, both parents born in Maryland, speaks English, no occupation

On 26 April 1942, James Leonard Young registered for the World War II draft, giving his address as 3103 Weaver Avenue, Baltimore, Maryland; mailing address the same; telephone HA. 4533; 50 years old; born 1 April 1893 in York County, Pennsylvania; name of person who will always know your address Mrs. Mary Young; employer’s name James. L. Young (owner), 3103 Weaver Avenue, plastering business; race Negro [sic]; height 5’6”; eyes black; hair gray; complexion dark.

On 1 June 1944. James L. Young married Mary Turk (maiden name Mary Kopp) in Alexandria, Virginia. He was 52, white, single, not previously married, occupation plasterer, born in Shawuburry, Pennsylvania, father Robert P., mother Laura Wagner, residence Beverley Hills, Baltimore, Maryland. She was 52, white, widowed, once previously married, no occupation, born in Baltimore, Maryland, father Charles M. Kopp, mother Wilheima Straline, residence Beverley Hills, Baltimore, Maryland. [State of Virginia, Certificate of Marriage 12347.]

His obituary reads [paper unknown]:
YOUNG
On August 22, 1970, J. LEONARD SR., beloved husband of Mary T. Young (nee Kopp), and devoted father of Mrs. W. Clara Vogel, Mrs. Alverta Dukes and James L. Young Jr. Also survived by five grandchildren. ¶Funeral services are to be held at H. Sander & Sons, North avenue and Broadway, on Wednesday at 10 A.M. Interment in Loudon Park National Cemetery. Friends may call from 1 to 4 P.M. and 7 to 9 P.M.

Another obituary reads [paper unknown]:
J. L. Young, Plastering Firm Chief
J. Leonard Young, Sr., who headed his own plastering concern for many years, died Saturday at Union Memorial Hospital after a long illness. He was 78 years old. ¶Based in Baltimore, the J. Leonard Young firm has done plastering work in such places as Ocean City, Roanoke, Va., and Greensboro, N.C. ¶A native of Baltimore, Mr. Young lived at 3103 Weaver avenue for 31 years. ¶He served in the Navy during World War I. ¶Mr. Young was a deacon in the Christian and Missionary Alliance Fellowship Church on Eastern avenue. ¶He is survived by his wife, the former Mary T. Kopp; two daughters, Mrs. W. Clara Vogel and Mrs. Alverta C. Duke; a son, James L. Young, Jr., all of Baltimore, and five grandchildren. ¶Arrangements for funeral services have not yet been completed.

Date also provided by a memorial card from H. Sander & Sons, Inc. Funeral Home at North Avenue and Broadway, Baltimore, Maryland.