In fact if you go to morphos-team today, you will not find the name "Amiga" except for in "amigaguide.library"
Yes, but if I browse through my MorphOS setup (startup's etc.) I'll find - of course - stuff like "Kickstart" or "Workbench" all over, which is needed for backwards compability. Both names are copyrighted, though. Same is/might be true for AROS. Does ReactOS have a "windows32.dll" (or similar)? :-)