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Two brothers escaped to Ireland and changed their name to McKern or MacKern. Descendants moved to Argentina and Australia when the potato famine struck around 1850. Australian descendants include the late actor Leo McKern[citation needed].
http://en.wikipedia.org/wiki/Massacre_of_Glenc oe
Many of the clan did escape the slaughter only to die in the surrounding hills and mountains due to lack of food and shelter as their houses had been burned down.
The chief's sons escaped into the snow and although the clan was temporarily demoralised they fought in the 18th century for the House of Stuart during the Jacobite Uprisings of 1715 to 1716 at the Battle of Sherrifmuir and 1745 to 1746 at the Battle of Prestonpans.