Excel has the following built-in defined names for specific purposes, they all begin with "_xlnm" in XLSX:
These are related to print area/title, filter & advanced filter and various less important stuff. For details see ECMA-376-1 18.2.5. There are somewhat similar XLS equivalents, not listing those here.
In Calc these tend to show in Manage Names dialog (Sheet -> Named Ranges and Expressions -> Manage...), but as they have specific purposes, and can be set in different places, they shouldn't really be listed there.
They also tend to be exported in multiples if a defined range is changed, which shouldn't happen.