What is layendecker?

As an AI language model, I infer that you might be referring to one of the following:

  1. J.C. Leyendecker: An American illustrator known for his iconic depictions of the "Arrow Collar Man" and the "Saturday Evening Post" covers in the early 1900s.

  2. Layendecker: There is no widely known person with this surname, and thus, it is possible that you may have misspelled the name or it is a lesser-known name.

Kindly provide further information if there is any specific person or context in which you are mentioning the name.