IMHO it is a complex thematic. Efke is a Croatian filmfactory near Zagreb/Agram which used the receipe and machines from the former (German) filmfactory Adox.
Mirko Bödecke (Fotoimpex, Berlin) bought the trade mark "Adox" in the early nineties and helds since end of the nienties parts of the croatian filmfactory Efke. Efke-Adox is an old style (Ag -rich, non T-crystal) film type.
Rollei Film is a trade mark which is owned by an film trader from northern Germany. He used to relabel Agfa film. Since Agfa Leverkusen stopped production some years ago nowadays most of the Rolleis changed their interior. IMHO Agfa Gevaert Belgium , which still produces fim material (most non customer items like aerial fim etc.) but iMHO no ISO 25 b&w Pan material.
So it might be that Rollei 25 and Efke/Adox 25 are today near relatives.