Which Name Comes First in Double Barrel?

A person will take the (first) surname of their father, followed by the (first) surname of their mother (i.e. their maternal grandfather's surname). The double surname

How do you double barrel a name?

What is a double-barrelled surname? A double-barrelled surname is created by combining the surnames of a married couple by either using a hyphen or by simply adding the second name onto the husband's or wife's existing surname.

Which last name goes first?

Traditionally, the first surname is paternal and comes from the father, while the second surname is maternal and comes from the mother. In recent years, some countries have allowed parents to alter the order of surnames for their children, but in historical records paternal surnames generally precede maternal names.