"No one would have openly used Nan's spellings Dorathy and Danel..."
Well, I just chose those particular examples off the top of my head. However, if you'll check out the Office of the Chief Actuary's name lists at:
http://www.ssa.gov/OACT/NOTES/note139/note139.html
You will see that both "Dorthy" and "Danial" made it to the Top 1,000 Names of the 1950s list. :)
-- Nanaea