The Changing of the Names

Exhibit A is a 1975 Flash cover drawn by Ernie Chan. But wait. I believe he was still known by the name Ernie Chua at that time. I can understand a name change from "Chua" to "Chan" if it was supposed to be Chan all along but some mistake had been made. Likewise, I can understand changing "Datsun" to "Nissan" if it was supposed to be Nissan all along.

But why change "Berni" to "Bernie?" And why change "Betty" to "Bettie"? Mr. Wrightson and Ms. Page must have had personal reasons for those transitions, and I have wondered from time to time what those personal reasons could have been.