Modern Chisholm Clan Heavy Weight Tartan. Norman in origin the first of this clan settled in Roxburghshire sometime about or before the 13th century. Sir Robert de Chisholm was Constable of Urquhart Castle in the 14th century and his son, who married the heiress of Erchless, was the progenitor of the Chisholms of Comer and Strathglass. For their participation in the Jacobite Rising of 1715 the Chisholm estates were forfeited but, following a pardon, they were restored to them in 1727. The clan supported Prince Charlie during the 1745 Rising and one of the seven men who hid the Prince in their Glenmoriston cave after the Battle of Culloden, was a Chisholm. Erchless Castle, the old home of the chiefs, has now passed out of Chisholm possession.