1552. August 4. Malcum McAynmallicht (son of John Malloch) Donald his brother, Duncane McNeill VcKewin (Ewin) William and Malcum McNeill VcEwin brothers to the said Duncane, renouncing McGregour their Chief, bind themselves to Colyne Campbell of Glenurquhay giving him their Calpes.” - B.B. of T.
 1604. March 1 Five persons executed. - 4. Duncan MacGregor.
 BBT page 232, Bond by Gregour Makconaquhie V'Gregour in Roro, Alestir M'Evin V'Conaquhie there, Gregour Makolchallum in Inuerbar in Glenlyoun, Duncan Makgrgour his son in Killdie and Williame Makgregour sone to the said Gregour there to Duncane Campbell of Glenurquhay .... obliging themselves if it should happen that Makgregour by himself or his accomplices whould break upon the said Duncane ... to renounce him as their chief and to take part with the said Duncane against him. William Makneill in Fernay Neill M'Conoquhie in Fearnay Meanach ... witnesses At Balloch 5 July 1585.
Duncan McInvallich in Comrie is mentioned in the roll of 1589-90  as also Donald Maceanvallich, specified as his brother. Duncan is also among the principal men of the Clan proposed by Glenstray as pledges in the Bond to the Earl of Argyle April 22. 1601. He is mentioned again as Duncane McGregour alias McInvalliche and now Drummond in August 1603, when the gift of his escheat was given to a follower of the Earl of Montrose, Duncan having been put to the horn for a debt. His being styled Duncan McGregor has led to the supposition that his father was named Gregor but in this instance his Clan name may have been given him. Duncan appears to have taken the name of Drummond, as the first of the Clan to adopt a new surname in accordance with the Order in Council 1603. This Duncan was certainly direct ancestor of the House of Balhaldies.