The family name is from the time when the king and the town's
name was spelled in the old way. It was not until around 1772,
the town name was changed to the current Fredericia.
Read more about the family here or the city's history in the danish
book: Complete description of staple town Fridericia. by the
author: JN Wils. Published the year 1767 in Copenhagen.
Several pages from the book are showen here.