i have started doing this this structs I work on but in an effort to help control the unknowns i have started doing this, and am backtracking throughout the versions where possible

so here is an example

unknown_vvv_#_XX
where vvv= is the version unknown found # is a sequential number # starting at 1 typically as we find what an unknown is we will get gaps
and XX is optional initials over dev who created the unkwown

this unknown should not be changed when a new struct version is created unless its true name can be determined

so the above unknown_1096_1_MJ will remain throughout future versions

this is just a suggestion, but i will try to adhere to it
to make things simpler later