The ancestor with this surname in my tree was Margaret Nightingale.
My line is:
1. Lois Whimpey
2. Ivon Walter Whimpey (1923-2009)
3. Edith Jean Marr (1922-1990)
6. Wilfred Palmer Marr (1892-1955)
7. Edith Meriden Docwra (1904-1948)
14. Harry Docwra (1866-1934)
15. Emily Alice Oliver (1877-1925)
28. Alfred Docwra (1824-1903)
29. Mary Scott (1830-1885)
56. Tempest Sell (1787-1861)
57. Jane Docwra (1800-1840)
112. Simeon Sell (1753-1822)
113. Edith Leete (1765-1798)
224. Tempest Sell (1714-bet 1761 and 1776)
225. Mary Leete (1726-?)
448. Henry Sell (1684-?)
449. Bridget Tempest (1690-?)
896. John Sell (1644-1726)
897. Margaret Nightingale (1650-1719)
Margaret Nightingale was born about 1650. She married John Sell on 5 July 1675 in Bassingbourn, Cambridgeshire, England, and they had 14 children who were all born in Bassingbourn.
Margaret was buried 10 March 1719 in Bassingbourn.
There is a possible baptism entry in Bassingbourn:
1656 Dec 27 Nightingall Kathren [[Margaret]] dau of William & Mary
However, there is also a burial that appears to be for the same person
1657 Feb 9 Nightingall Kathren of Kneesworth dau of William & Mary
I have therefore not been able to trace the Nightingale line back any further at this stage.
Lois Willis - Genealogy and Family History 