Tim Theisen created ghostview 1.5, which was the starting point of gv.
Peter Deutsch is the author of the ghostscript interpreter, without which gv would be not more than an empty hull.
Kaleb S.Keithley turned Xaw into the extremely nice Xaw3d widget set.
Keith Packard invented the Layout widget, the heart of gv's widget tree.
Finally I'd like to thank Jim Jennis (James_H_Jennis@mail.mmmg.com) for carefully testing all versions of gv. If there is something like the notion of a 'chief-beta-tester' he deserves this attribute for his careful and devoted work.