Modern invented name, possibly a variant blend of Nathan (Hebrew, 'he gave') with a K- prefix.
Kathen is a modern invented name, possibly a blend of Nathan with a K- prefix. That makes its structure feel familiar but shifted, as though a traditional sound has been reworked into a fresh form. Kathen sounds compact and modern. It has the clean, adaptable feel of a contemporary coined name, with enough recognizable structure to make it easy to say and remember.