Players with double-barrelled surnames

[Harry Monk]

Indeed. It's strange how tradition still trumps the concept of equality. In Iceland siblings have different surnames, of course.

They use patronymics (as the Welsh did up until Anglicization) so, taking Aron Gunnarsson as an example - he is the son of a man named Gunnar. His male siblings would also be Gunnarsson, but his father would have a different surname depending on the first name of his own father, so he could be something like Gunnar Aronssson. Gunnarsson's female siblings would have the surname Gunnarsdottir.

The same system was used in Wales until (depending on what county you were in) the Anglican church started to force the use of fixed surnames. That's why most Welsh surnames are a first name with an "S" on the end or prefixed with a "P" or "B".

[Taunton Blue Genie]

They use patronymics (as the Welsh did up until Anglicization) so, taking Aron Gunnarsson as an example - he is the son of a man named Gunnar. His male siblings would also be Gunnarsson, but his father would have a different surname depending on the first name of his own father, so he could be something like Gunnar Aronssson. Gunnarsson's female siblings would have the surname Gunnarsdottir.

The same system was used in Wales until (depending on what county you were in) the Anglican church started to force the use of fixed surnames. That's why most Welsh surnames are a first name with an "S" on the end or prefixed with a "P" or "B".

Some females adopt their mother's name instead of their father's. Gunnarsdottir may instead be Ingasdottir.