comaker

[koh-mey-ker, koh-mey-ker]
noun Finance.
  1. a person who formally undertakes to discharge the duties of the maker of an instrument, especially a promissory note, in the event of the maker's default.

Origin of comaker

First recorded in 1930–35; co- + maker
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018