#signatory__signer  someone who signs and is bound by a document
  supertype:  person__individual__someone__somebody__mortal__human__human_being__humanbeing__soul  a human being; "there was too much for one person to do"
  subtype:  cosignatory__cosigner  one of two or more signers of the same document (as a treaty or declaration)
  subtype:  cosigner  a signer in addition to the principal signer (to verify the authenticity of the principal signature or to provide surety)
  subtype:  abhorrer  a signer of a 1679 address to Charles II in which those who petitioned for the reconvening of Parliament were condemned and abhorred
  subtype:  endorser  a person who transfers his ownership interest in something by signing a check or negotiable security
     subtype:  accommodation_endorser__accommodationendorser  a person who endorses a promissory note without compensation or benefit but simply as a favor to the borrower
  subtype:  attestant__witness__attestor__attestator  (law) a person who attests to the genuineness of a document or signature by adding their own signature

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