Though I have to admit that it's a bit confusing that a typeglob keeps track of it's original package and name, even after it isn't listed there anymore.
lanx@lanx-1005HA:~/pm$ cat tst_glob.pl
$\="\n";
$n=123;
$gr=\*n;
print *n{PACKAGE}," :: ",*n{NAME}," = ", ${*n{SCALAR}};
delete $main::{n};
print *{$gr}{PACKAGE}," :: ",*{$gr}{NAME}," = ", ${*{$gr}{SCALAR}};
lanx@lanx-1005HA:~/pm$ perl tst_glob.pl
main :: n = 123
main :: n = 123
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