Who are Scotland's Clan Chiefs?

[Damion]

Both their mother and their father were clan chiefs in their own right.

Women cannot be clan chiefs under traditional clan law I thought. If no suitable male heir is available then the chief is meant to be chosen from within a male kingroup, the derbfine. It's the principle of tanistry which is how the Gaels of Ireland and Scotland selected their leaders. The reasoning in part is that clan names are taken from a supposed male ancestor, they can't be conferred from the female line though I suppose adoption is a possibility.