Per L&M Companion"
d. 1668 A professional soldier who served in the English Regiment in Holland. Third son of the 2nd. Earl of Leicester, of Penshurst (d. 1677).
( http://en.wikipedia.org/wiki/Robert_Sidney,_2nd_Earl_of_Leicester )
The brother of Algernon ( http://www.pepysdiary.com/encyclopedia/6041/ ) and Henry
( http://www.pepysdiary.com/encyclopedia/9424/ )
Chart showing the number of references in each month of the diary’s entries.