what does "of that ilk" mean?

[skauwt]

Ah but it is tied to chiefship, as you put it. Please see my previous post. Chisholm of Chisholm may be interpretted as "Chisholm of that Ilk."

so your telling me my ancestor was a chief in the 1550s at the borders? ive traced my tree back to just after the 1520s and the of that ilk is stop being used by about 1600