Claim: Christoffersen is a very popular name in Denmark, and is spelled a few different ways.
Evidence: Christoffersen (Danish pronunciation: [kʰʁiˈstɔfɐsn̩) is a Danish-Norwegian patronymic surname, literally meaning son of Christoffer, the North Germanic form of the Greek given name Χριστόφορος, Christóphοros. There are two less common spelling variants Kristoffersen and Christophersen; they have identical pronunciation. In Denmark, the three spelling variants are the 53rd, 83rd, and 205th (respectively) most popular surnames.