Before this improvement, the first name and last name contained in a QES signer's certificate were necessarily the first of the first names and birth name. From now on, a certificate generate for the qualified level can contain any first names as long as it is present on the identity document used, regardless of its position on the ID document, and a usage name (such as a married name, for example) if it is also present on the identity document.
The condition remains the same: the identity declared by the Sender and the identity on the ID document must strictly match.
Find out more about parsing rules here.
You will find all information about the Yousign QES in our guide.