Anthony Lowther, FRS (c. 1641 – 27 January 1693) was an English landowner, of Marske,Yorkshire and Member of Parliament.
He was one of the original Fellows of the Royal Society, from its chartered inception in 1663.
In February 1667, he married Margaret Penn, daughter of Sir William Penn, and had one son
It appears Mr. Lowther was 5 years younger than Margaret, who was born in 1636. His biography as an MP is at
Anthony Lowther's Parliamentary bio made me investigate Marske Manor, Yorks. He was a wealthy young man, and there is no hint of him being a Quaker or anything but a Royalist son of Cavaliers anywhere:
"Possibly financial difficulties, due to James Pennyman of Ormesby's adherence to the Royalist cause, may be the reason for the sale in 1650 of the manor of Marske to Eleanora Lowther, widow, and others. (fn. 82)
82. Feet of F. Yorks. Trin. 1650.
"These persons seem to have been acting for Robert Lowther, for in January 1666–7 Marske Manor belonged to Robert's son, Anthony, (fn. 83)
83. Recov. R. Hil. 18 Chas. II, m. 51."
For more, see https://www.british-history.ac.uk/vch/yorks/north…
Chart showing the number of references in each month of the diary’s entries.