It's a combination (portmanteau) of lovlies and doves. Portmanteau - Wikipedia, the free encyclopedia
Student or Learner
Mss. Emma Wedgwood (Darwin's wife) and her sister Fanny were known as the «Dovelies»
What does the nickname mean?
Is it something like "little doves" or "doves-like"?
They were the youngest in the Wedgwood family, does it help?