Origin of the name ELFRIEDA.
Etymology of the
Meaning of the baby name ELFRIEDA.
A variant form of English Elfrida (q.v.),
from Anglo-Saxon Ælfþryð
(q.v.), meaning "threatening
elf." Also spelled Elfreida.
Mary Lou Williams, born Mary Elfrieda Scruggs (d.
1981), was an African-American jazz pianist, composer and bandleader. (Wiki)