I have been busy and working back from my Grandmother I have somethig like this,
Born in 1844 in Bakewell Derbyshire, John Wragg was lodging at Marsden House, Brimington in 1871, single man, aged 28. It would appear he married two girls named Bowmer, Mary Ann and Ann Bowmer. His first wife, Mary Ann was the daughter of Hugh & Jane Bowmer (nee Nightingale) who he married in June qtr 1873 GRO ref 7b 1143 Chesterfield district. His second wife, Ann Bowmer in Sept qtr 1880 GRO ref 7b 797, Belper district was the daughter of Benjamin & Elizabeth Bowmer (ne Roper) {she was Mary Ann's aunt}. The marriage took place at The Congregational Church & Chapel of Wirksworth. Witnesses to the marriage were John Bowmer (brother of bride) and Susannah Shenton. All parties signed the register themselves. The couple can be found in the 1881 census with two children, Fanny Jane Wragg, 6, and Samuel Wragg, 4 (children of the first marriage) living at Burnell St., Brimington. Ann Bowmer was John's second wife as he was a widower at the time of their marriage, aged 34 years, the son of Samuel Wragg Labourer. In 1891 John Wragg and Ann were resident at 1 Brook Terrace, Matlock. John was aged 47, Ann 38. There is an additional child in the household, Annie E Wragg aged 6, born Brimington. Fanny Jane Wragg is missing from the household at this time but can be found on the night of the 1891 census in the household of Hugh & Jane Bowmer, aged 11, described as "granddaughter". By 1901 John & Ann Wragg were back at Wirksworth, at Steeple Grange, living with daughter Annie E. John was aged 57, Ann 46 and Annie E, 16. Throughout his lifetime John Wragg was described as "Labourer, Gas Works, Gas Maker,Gas Stoker & Labourer and a Fireman.
It is through Mary Ann Wragg nee Bowmer that the name Nightingale comes up, I cannot see any way that there is a relationship to FN because the name should be Shore.
Will keep you posted, as obviously I now need to double check all.