We have a family middle name that runs through my mum's family. It's my grandmother's maiden name (she is danish), and all her children had it as a middle name. Then my mum and her brother's and sister's all gave their kids the same middle name (sometimes paired with another middle name). My DS has it has one of his middle names, as will bub that is to be born any day. It's just a nice family tradition - and also a way to pay tribute to the danish blood running through our veins .