Vidya Jyothi Osmund Jayaratne (1924–2006) was a Sri Lankan academic and politician. He was the President of the Colombo Campus, University of Sri Lanka (now the University of Colombo), Emeritus Professor of Physics. As a left wing politician he was a member of the Lanka Sama Samaja Party playing major role in the Hartal 1953.
Osmund (fl. C. 760 – c. 772) was a King of Sussex, apparently reigning jointly with Oswald, Ælfwald, and Oslac.According to the Anglo-Saxon Chronicle, version D, Osmund was reigning in Sussex when Archbishop Cuthbert died in 760, so his rule commenced before that event.Osmund’s reign was from in or before 760 to between 770 and 772, as he witnessed a charter of Offa, King of Mercia, dated 772 as Osmund dux. Evidently he was demoted from king to ealdorman following Offa's conquest of Sussex.