I doubt, I regret to say, very much the authenticity of your sources. What are they? Among my ancestors there is a Christian K. married (no date known, ca. 1545-1550) to a Anna Hofer. There are several K-man married to Burkis, but I lacking knowledge about the genealogy of this (also) typical Emmental-family.
What is your (presumed) list of Krahenbuhl-ancestors? Maybe I can check your data and sources.