In the 70s I called our firstborn Chloe. when I first got together with my second husband it turned out his first, 2 years older than mine, was also Chloe. It was a very rare name in the 70s, nobody could spell or pronounce it - we got Cleo and something that sounded like Schloer, and often spelt Chole ("Oh, I knew there was an H in it somewhere" - yes, but not an O before the L, just try saying it!"
Thirty years later ands everyone was calling their little girl Chloe. But ours are in their 40s now, and have "youthful" names.
Over thirty years ago an 11-year-old girl I was teaching said "I think it's WICKED to call a baby something like Margaret" (pronounced with great disgust). I told her gleefully that it was my middle name.
Names for babies that will become adults one day: my mother, in the 50s, said she thought it was awful to call a baby Wendy because she regarded it as a baby name and a grown-up Wendy would just look silly.
And what seem currently like hideous old ladies' names must once have been thought nice for a new little girl. In Victorian novels and dramas the beautiful young daughter of an aristocratic family was likely to be the Lady Agatha.
My dog is called Gertie. After our house number (Basil Brush's friend was Dirty Gertie from Number Thirty). Haven't seen that coming back, though I was quite surprised I hadn't noticed at the time that the little sister in ET is called Gertie!