
1) Danish surname 2) Patronymic surname
Found on
https://www.crosswordclues.com/clue/mathiesen

Mathiesen is a Danish-Norwegian patronymic surname meaning `son of Mathies` (equivalent of the Biblical Μαθθαιος, cf. English Matthew). Several spelling variants are used, including Matthiesen, Matthiessen, Mathisen, Matthisen. A similar diversity of forms exist for the parallel given name Mathias. There are several people with the surna.....
Found on
http://en.wikipedia.org/wiki/Mathiesen
No exact match found.