In 1521 he married Margaret Moubray, daughter of John Moubray of Barnbougle (she had previously been married to John Cornwall before his death in 1513), and they had five sons and two daughters, including:[1] On 20 May 1527, when he was titled Master of Menteith, he ran away from the King's army at Solway, but was pardoned despite it being considered an act of treason.
[4] William Graham was killed in a clan fight some time in autumn 1543, but certainly by 23 January 1544; some sources state that he was killed in October 1543 by the Tutor of Appin (a member of the Stewart family), after the Stewarts and their army ate a wedding feast to which the Earl had been invited.
Historian Andrew Fleming Hutchison recorded the colorful details this way: Another version [of Graham’s death] sends the men of Athole to the Isle on a friendly visit.
The Murrays, probably thinking it a good joke, gathered up the roasted fowls destined for his dinner and took their departure.
Soon the Earl arrived and, learning what had occurred, set off in eager and angry pursuit up the slopes of Mondhui.