My friend, the Head of the Home Economics dept. at my high school knew Mrs. Julia Kiene so I know that she was a real person, unlike Betty Crocker. As to what happened to them, I guess they all died like everyone else. Funny, I don't remember KitchenAid ever having a home economist. I checked some manuals and it was always the Hobart Corporation.
The only time I saw a name in a Frigidaire manual was in the manual for the WO-65. In the first page, there are pictures of two ladies, Verna L. Miller and Eleanor A. Ahern. Above their pictures, part of the text reads,
"To make doubly certain of making this the best book possible, Frigidaire retained the services of Eleanor A. Ahern, nationally recognized Home Laundry authority and consultant, who personally supervised the preparation of this book."
"All of the suggestions contained herein have been written in cooperation with the Frigidaire Home Economics staff under the direction of Verna L. Miller, and can be relied upon to give you consistently good results."
I have a Tappan Electric range manual from 1959 signed by Betty Brown, the director of Home Services who urged the owner to write the Home Service Department for assistance.
Every GE manual says the retailer can help with any questions you might have and is signed by the Consumers Institute, but one range manual from the late 50s is signed by Betty B. Olson.
Hamilton dryer manuals do not give a name of a home economist.
Linda Marshall ran the Home Service Department at Maytag, according to the introductory notes in the manuals.
I would like to note here something we discussed in the distant past, that for women to sign their names like this with their first and last names was most unusual for the period, if they were married. At the time, this was not considered either proper form or their legal name, if married and perhaps was done to establish a link of friendship with the women who were reading these manuals.