Inheritance in Tortall

Straight from the the mouth of Tamora Pierce:
 * Sons inherit. That’s generally the rule. Inheritance of fiefs varies according to the terms of the royal grant and any exceptions the original holders of the grant got the crown to allow–there are fiefdoms in Tortall, like Olau, where inheritance goes to oldest child, not oldest son.

Things have changed, of course, since Thayet and Jonathan got their hands on the kingdom; in fact, their granddaughter inherited the throne - but generally, males still inherit.