Shirley MacLaine and
Shirley Jones were both born early in 1934, before
Shirley Temple’s first feature film premiered (
May 1934). The former two Shirleys were named that for the same reason
Shirley Temple was: it was a popular name at the time.
https://nanowrimo.org/participants/christine-seaforth-finch
http://christineseaforthfinch.blogspot.com/