Edward Ellerker Williams (22 April 1793 – 8 July 1822) was a retired army officer who became a friend of Percy Bysshe Shelley in the final months of his life and died with him.
Williams's Sporting Sketches during a Short Stay in Hindustane
contains drawings and journal descriptions of places and events during a leave of absence he took in 1814.
He remained with his regiment until 1817 and retired on half-pay on 28 May 1818. During his time in India he met and served with Thomas Medwin, the cousin of Shelley.
Williams returned to England, taking with him Jane Johnson, the wife of another army officer, née Cleveland (1798–1884), who told him her husband mistreated her and that she was justified in leaving him.Some time before September 1818, she began using the name Jane Williams, and hereafter they presented themselves as Mr. and Mrs. Williams.Edward Ellerker Williams in Wikipedia