On 10 May 1905 in Westmoreland County, Virignia, William Lucas married Martha Branson. He was 21, she was 17. Both were single, born and residing in Westmoreland County, Virginia. His parents were Robert and Margaret Lucas; her parents were Esaw and Eliza Branson. His occupation was laborer. [Westmoreland County, Virginia, Register of Marriages, 1854–1908.]

1930 U.S. Census, Baltimore City, Maryland
11th Ward
1104 Madison Avenue, dwelling 11, family 20
Lucas, William, head, rents for $40, owns radio set, male, negro, 45, married, age at first marriage 21, not in school, can read and write, born in Virginia, both parents born in United States, speaks English, janitor for apartment house, wage worker, at work previous day, not a veteran
Lucas, Martha, wife, female, negro, 40, married, age at first marriage 16, not in school, can read and write, born in Virginia, both parents born in Virginia, speaks English, servant for private family, wage worker, at work previous day
Lucas, Robert, son, male, negro, 20, single, not in school, can read and write, born in Virginia, both parents born in Virginia, speaks English, no occupation
Lucas, Margaret, daughter, female, negro, 15, single, in school, can read and write, born in Maryland, both parents born in Virginia, speaks English, no occupation
Butler, Frances, daughter, female, negro, 24, married, age at first marriage 19, not in school, can read and write, born in Virginia, both parents born in Virginia, speaks English, no occupation

1940 U.S. Census, Baltimore City, Maryland
11th Ward
1108 Madison Avenue, Visited No. 52, rented
Lewis, William B., head, male, negro, 57, married, not in school, highest grade attended 3, born in Virginia, in 1935 living in same place, in private work, 72 hours worked previous week, caretaker for health clinic, worked 52 weeks, income $650, no other income
Lewis, Martha, wife, female, negro, 50, married, not in school, highest grade attended 6, born in Virginia, in 1935 living in same place, not at work
1104 Madison Avenue
Guy, George, son-in-law, male, negro, 25, married, not in school, highest grade attended H-2, born in Maryland, in 1935 living in same place, at private work, 40 hours worked previous week, porter for Hutzler Brothers, 52 weeks worked previous year, income $832, no other income
Guy, Margaret, daughter, female, negro, 25, married, not in school, highest grade attended H-4, born in Maryland, in 1935 living in same place, not employed
Butler, Frances, daughter, female, negro, 33, married (seems to be struck through), not in school, highest grade attended H-4, born in Virginia, in 1935 living in same place, not employed

1950 U.S. Census, Baltimore City, Maryland
Enumeration District 4-658, Sheet 9
1520 Retreat Street, not on a farm
Lucas, William B., head, Negro, male, 67, married, born in Virginia, worked 40 hours previous week, janitor for health center, private employer
Lucas, Martha B, wife, Negro, female, 57, married, born in Virginia, engaged in housework, not seeking work
Lucas, Robert B., son, Negro, male, 38, divorced, born in Virginia, worked 40 hours previous week, mail carrier for post office, government worker
Gray, Margret E., daughter, Negro, female, 35, separated, born in Maryland, work code other, seeking work and did not work previous week, laundry marker for laundry, private work
Meads, Ernest M., grandson, Negro, male, 19, never married, born in Maryland, work code other, seeking work and did not work previous week, bakers helper for bakery, private work