this is my thinking:~
Florence Nightingale was born in Florence 12 May 1820 to William Edward and Frances Nightingale
William & Frances were a wealthy couple and toured Europe for 2 years on honeymoon.
Florence had an elder sister Parthenope b. 1819 in Naples
In the summer the nightingale family were based at Lea Hurst Derbyshire and in the winter they were based at Embley in Hampshire
Florence & Parthenope were tuaght at home by their cambridge educated father
can we find the marriage of William Edward Nightingale & Frances can we find their parents by finding their bapt. reocrds and then subsequent siblings?
can we find Florence father William Edward cambridge records (these should be held Either at Cambridge or at the County Record office)
can we find the fmaily in the 1841 census and then follow them through to their subsequent deaths - they may be staying with other family relatives.
Parthenope Nightingale married Earl Verny and in doing so became Lady Verny they lived at Claydon House Bucks who were their children?
is this true?
Harry VERNEY Bt. 2nd [Parents] was born 1 8 Dec 1801 in London, Grosvenor Place, London. He died 12 Feb 1894. Harry married1 Eliza Hope 2 Frances Parthenope NIGHTINGALE on 23 Jun 1858 in East Wellow, Hampshire, England.
Frances Parthenope NIGHTINGALE [Parents] died 1890. She married 1 Harry VERNEY Bt. 2nd on 23 Jun 1858 in East Wellow, Hampshire, England.
lots to explore which might lead you to a connection.