Robert Waring - was both grandfather and father of Anne Waring : there are two references to Robertus Waring in Thoroton's History of Nottinghamshire.
Anne (Waring) Darwin (1664 - 1722) https://www.wikitree.com/wiki/Waring-317
The page links to her father Robert https://www.wikitree.com/wiki/Waring-318, baptised in 1572.
Examination of these dates above shows that it was unlikely that this Robert was father to Anne (Waring) Darwin:
Robert senior was baptised in 1572 – & buried in feb 1662, a month after Anne's baptism (both on page 6, Darwin Pedigrees); Robert junior died 1682 (page 27, Darwin Pedigrees);
I see the dates for Anne, 1662 from Darwin Pedigrees, and 1664 in Wikitree differ slightly.
Nonetheless; - I believe that Robert Waring (senior) had a son Robert Waring, and that Robert Waring (senior) had a grand-daughter Anne (Waring) Darwin, by his son Robert and Anne Pate.
Clearer evidence can be gleaned from the Staunton link:
Robert senior and Frances (nee Palmer, 1st marriage Staunton) had three children of their own; there were two to Robertus Waring; see Thoroton's History of Nottinghamshire page 309, or here https://quod.lib.umich.edu/e/eebo/A62469.0001.001/1:8.60?rgn=div2;view=fulltext .
Just to square off the relationships (mentioned on same Thoroton page):
Edmund was Robert senior’s elder brother, and also had a daughter Anne (by Mary Broughton https://www.wikitree.com/wiki/Waring-551) .
Anne married William Staunton, who happened to be the son of Robert's wife Frances by her first marriage to Anthony Staunton.
There is a more contemporary reference, a letter that mentions Anne’s grandfather Robert here: https://www.darwinproject.ac.uk/letter/DCP-LETT-472.xml
Several references on the net, but not all, describe Robert senior as father to Anne, so I know I'm contradicting these, but I believe this second Robert removes a lot of uncertainty. Even "Darwin Pedigrees" which includes masses of useful info, also omits the second Robert in a family tree (page 30).
Hope this is useful.