This is embarrassing. I worked with Cab Calloway's much young half sister, Camilla, from 1979 to 1982 without knowing the relationship. If Pearl Bailey and Cab Calloway did not play Philadelphia with "Hello, Dolly," during those years I may never have known.
Camilla was the director of HR, and not a particularly warm or friendly person.
@jerrybythesea, Pearl Bailey (Broadway) and Mary Martin (London) recorded original cast recordings as well.