The Lloyds were both designers in Detroit, Mich. Bertha Elizabeth Lloyd specialized in leatherwork, lacemaking, and embroidery, and Ethel Spencer Lloyd specialized in jewelry, silversmithing, and embroidery.
Brenda Putnam (1890-1975) was a sculptor from Minneapolis, Minn. Among other institutions, she attended the Boston Museum of Fine Art School and the Art Students League. She was an artist for the WPA as well. She and the Lloyds were presumably friends.
From the description of Bertha Elizabeth & Ethel Spencer Lloyd papers, 1936-1955. (Unknown). WorldCat record id: 122514890