Writing a short story focusing on a royal family and need some help with advisers' titles.

As said, I'm writing a story that focuses on the inner workings of a royal family and those around them. The King/Queen has a council of advisers that inform them or the happenings within and without the kingdom so as to make better decisions. This council consists of those directly in charge of different branches of govt. such as military, domestic affairs, etc.

I've got the Spy Master for the more sensitive politics like information and , Master General for the Military, Lord/Lady Regent for domestic relations, and finally Lord/Lady Protector for the royal guards.

If I were to make it a fantasy setting, what title sounds good for whom ever is in charge of or responsible for magic related issues?