I have a number of images of “Toni” at Donn’s Encino house parties circa 1946. On none of them does it give her last name. I’m sure one of you can identify her as she was famous enough not to need her last name written down in 1946!
UPDATE: The answer seems to be Alma Ross and Toni Lanier.

Toni with William Powell

Ronald Coleman, Toni and Herbert Marshall enjoy a curry.

Toni, Waltah Clarke, his wife and Alma in Donn’s bed.

Jon Hall, Toni and “Nash’s cousin” enjoy skewers at Donn’s party. Looks like Alma again.

Toni, Alma, Benjamin Britton, Paul Hesse, June Haver, Bob Stack, and Dave Rose enjoying a suckling pig.