E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
The surname of the person spoken of is the same as the name of his estate. It is quite a mistake to use the phrase All that ilk to signify all of that name or sort. Bethune of that ilk means Bethune of Bethune. (Gaelic, ilk, clan; Anglo-Saxon, ilc, the same.)