Original: The Swedish king, Adolf Fredrik, granted Linnaeus nobility in 1757, and after the privy council finally had confirmed this (in 1761 after a few years of discussions) Linnaeus took the surname von Linné, later often signing just Carl Linné.
Simplified: The Swedish king Adolf Fredrik made Linnaeus a noble in 1757, and Linnaeus took the last name von Linné, later often signing just Carl Linné.