I think this tag should be renamed "gershgorin-sets".
According to Wikipedia, the correct spelling can be Geršgorin, Gerschgorin, Gerszgorin, Gershgorin, הירשהאָרן, Hirshhorn or Hirschhorn (Гершгорин, not listed, should also be considered). That does not include Gersgorin, without haček. The most common spelling in english (and the one used on Wikipedia) seems to me to be Gershgorin.
According to this, only moderators can do that, and it should be discussed on Meta, hence my question here.